The biggest challenge in the Mentos Geyser Experiment is finding a consistent way to drop the Mentos into the soda every time. Sample morphology was determined by imaging the samples in an environmental scanning electron microscope (SEM).4 The uncoated samples were imaged in low vacuum mode. View the Mentos Geyser Experiment here! This demonstration illustrates many important ideas in physics, including key principles in thermodynamics, surface science, and the physics of eruptions. Carbonated beverages are full of dissolved carbon dioxide gas (CO2) which makes bonds with the water molecules. [12] Conjure a magical genie inside a root beer bottle, awaken a thirsty ghost, use your amazing brainpower to read minds, and more. Each mint has thousands of tiny pits all over its surface. What happens when you drop Mentos in a bottle of coke? Making science accessible and fun for youth. The pH of the Diet Coke after the baking soda reaction was 6.1, indicating that much of the acid present in the Diet Coke was neutralized by the reaction. Hence it is the combination of a rough surface and the surfactant in the outer coating of the candy that causes the impressive reactions. Retrieved from https://easyscienceforkids.com/diet-coke-and-mentos-video-for-kids/. . This activity is probably best done outside in the middle of a field or on a huge lawn where a little bit of mess wont be a big deal. Drinks sweetened with aspartame, such as diet Coke or the diet tonic water, are more explosive than drinks sweetened with sugar (corn syrup), which is likely due to a reduction in the work required for bubble formation when aspartame is added. We put 4 mentos pieces into the bottle of diet coke. We used the measured contact angle to calculate the minimum work required to form a critical bubble5 by the relation: where LV is the liquid-vapor surface tension, PP is the pressure difference across the interface, is the contact angle, and the function f() is given by. The video was titled Extreme Diet Coke & Mentos Experiments. Conclusion: The conclusion is a brief summary of the main findings of the study and their implications. The colorful nature of this chemistry experiment kit introduces your child to basic concepts of volume, measurement and chemical reactions in a safe, no-mess way. Regular Coke does not work with Mentos because the Diet Coke uses Aspartame instead of sugar, which regular Coke uses. WebFound the trial with soda and Mentos at Steve Spangler Science, with tutorial on how at make a huge explosion. Lee Marek and Mareks Kid Scientists performed the Diet Coke and Mentos experiment on the Late Show with David Letterman in 1999. Line up a row of 10 soda bottles against a brick wall. WebPut 5 room temp Mint Mentos in a geyser tube. This easy at-home experiment is a great way to "see" science. Diet Coke 280 8.6 Conclusion: The more mentos you put in a bottle of pop does not necessarily mean a larger explosion. The scale bars in each image represent the lengths (a) 200m, (b) 100m, (c) 20m, and (d) 20m. This bubbling process is called nucleation. The goal of this project is to explore the eruption of carbon dioxide when the candy Mentos dissolves in Diet Coke. What female country singers were on American Idol? Be sure that the soda bottles are all the same brand and type. KUSA-TV News posted that original video on their website along with my blog post titled, News Anchor Gets Soaked! Within a few weeks, links to the video and my blog entry numbered in the thousands. The places where the bubbles form are the nucleation sites. The uncertainty is approximately 10%. We put 4 mentos pieces into the bottle of diet coke. Science teachers started experimenting (as they like to do) with other candies and mints that would have the same effect when dropped into a bottle of soda. The rms roughness of a 100m2 image acquired in the AFM. These growth sites are not all on the surface of the bead, and hence the Diet Coke has to soak into the bead through the pores. What is inside Mentos and Cola that reacts with each other causing the eruption? Mentos are heavy and can travel the entire volume of the bottle, breaking many bonds and building a lot of pressure that is released in the form of a geyser of soda (Grobe & Voltz, n.d.). Muir, H. (2008, June 12). The question was asked on a special College Week episode of Who Wants to Be a Millionaire. Follow our step-by-step instructions in our Mentos Geyser Experiment to find out. The Diet Coke and Mentos reaction was the subject of a 2006 Mythbusters episode1 and first shown in 1999 on the David Letterman Show, and has become a popular in-class physics and chemistry demonstration from elementary school to college level classes. The experiment became a subject of the television show MythBusters in 2006. Lee Marek and "Marek's Kid Scientists" were the first to publicly demonstrate the experiment on the Late Show with David Letterman in 1999. Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water. Science of Mentos-Diet Coke explosions explained. Although this conclusion seems to refute the claims made by the Mythbusters, remember that in their experiments, Jamie added enough caffeine to kill you to the seltzer water. Although this conclusion seems to refute the claims made by the Mythbusters, remember that in their experiments, Jamie added enough caffeine to kill you to the seltzer water.1 So the relatively small amount of caffeine in a 2l bottle of Coke doesnt significantly affect the reaction. The tubes of candies were threaded onto a pipe cleaner and dropped into the soft drink to create a geyser. Sample contact angle images for (a) deionized water, (b) deionized water with added aspartame, and (c) deionized water with added potassium benzoate. The child who died from combining Mentos and Coca-Cola story is an updating of an older legend that began in 1979. Average horizontal distance traveled by the spray during the reaction. Drop the Mentos into the diet soda. WebKids TV Yenu and Sanu is home to gaining knowledge & entertain toddlers. 8:30 am 5:00 pm (MST), Steve Spangler Science Conclusion: The Diet Coke reacted to the Mentos, which means the hypothesis was correct. The Mythbusters also correctly identified the roughness of the samples as one of the main causes of the reaction. Thank you so much. A Diet Coke and Mentos eruption (also known as a soda geyser) is a reaction between the carbonated beverage Diet Coke and Mentos mints that causes the beverage to be expelled from its container. WebFun Science Experiments // Mentos and Coke / Soda ExperimentIncludes BOTH US size and Australian A4 sized files/spelling!This fun experiment explores the physical reaction This, in turn, allows the soda to form smaller bubbles that can retain its structure for longer due to the reduced surface area of the bubble. Everyone found their own method for quickly dropping the Mentos into the soda. Carbon dioxide is the chemical compound that consists of two oxygen atoms bonded to a carbon atom. The dependent variable is the the Diet Coke with the mentos because it depends on the mentos to have a chemical response. Toll Free: 800-223-9080 The scientific method is an important way scientists make observations and come to conclusions. The independent variable to this experiment is the Mento because it could stand alone and it does not depend on. Experiment with your sense of taste and your sense of smell with this simple experiment! The quantitative roughness information detailed in Table V was taken from this image. With 5 or 6 mentos the explosion went only 330 and 310 cm high. [3][11][12] In March 2002, Steve Spangler, a science educator, did the demonstration on KUSA-TV, an NBC affiliate, in Denver, Colorado. Each time, she was covered in more soda until her once-pink dress was now more Coke-colored than pink! He will be performing the crushed vs whole candy in a diet coke. Search for other works by this author on: Mentos and the scientific method: A sweet combination. Turns out that diet coke, which gets its sweetness from artificial sweeteners such as aspartame, is more commonly used than its regular counterpart. The independent variable to this experiment is the Mento because it could stand alone and it does not depend on. Repeat the process, varying the opening that the soda erupts from. This increase moves the system away from the equilibrium condition for that molar concentration of the gas. What is a good hypothesis for Mentos and Diet Coke? The sand and the table salt grains were roughly the same size, so we assume that the fall times for the sand and table salt would be comparable. We found that the Diet CokeMint Mentos reaction lasted 3.8s, the Diet CokeFruit Mentos reaction lasted 3.6s, and the Diet CokeWint-o-Green reaction lasted 4.9s. Warm soda tends to fizz much more than cold soda because of the solubility of gases in liquids. The Diet Coke and Mentos reaction is a popular experiment or demonstration in part because it inspires students to wonder, and inquiry-driven labs and active-learning demonstrations on this reaction have been implemented. The simplest method is to let the unopened bottle sit in the sun for several hours. [10] When the pressure is released from a soda bottle upon opening it, dissolved carbon dioxide can escape into any tiny bubble located within the beverage. Soda is made of sugar or artificial sweetener, flavoring, water and preservatives. It comes with six fun experiments, a test tube rack, fizzing tablet and vegetable oil chemicals to play around with. (Compare the volcanic explosions of Mt. Mentos and Coke Experiment How to Do It! The basic science of the Coke and Mentos reaction is fairly straightforward. Make sure your scale is in place, whether youre measuring by counting bricks or using an alternative method. The intensity of the reaction was determined by measuring the mass of the bottle using a double pan balance before and after the reaction to determine the mass lost in the reaction and by measuring the horizontal distance traveled by the sodas spray. Diet Coke and Coke Zero react better with Mentos than regular Coke does because of the absence of sugar. SEM images of playground sand acquired at a beam energy of 20kV and a spot size of 5.0nm. The enthusiasm for dropping mints into soda bottles continues to grow today. Retrieved January 31, 2021, from https://www.bravotv.com/top-chef/blogs/diet-coke-takes-longer-for-flight-attendants-to-serve-on-airplanes-bubbles#:~:text=Sugar%20both%20increases%20viscosity%20and,bubbles%20that%20pop%20much%20slower.%22&text=In%20the%20end%2C%20the%20total,out%20by%20a%20few%20seconds. The colder the liquid, themoregas can be dissolved in that liquid. One method for doing this is to roll a piece of paper into a tube just big enough to hold the loose Mentos, like a roll of coins. Open the soda and place the index card over the bottle opening. The longer reaction time is due to the many growth sites associated with the porous molecular sieve beads. [Full Guide]. What causes the explosion when Mentos are dropped into the Diet Coke? Now, its time to run away. Dog Diets: Will a Dog Prefer Homemade Dog Food? We found that the max amount of mentos with the largest explosion was 4 mentos, it went 350 cm high. If you decide to do this experiment against a wall, be sure to thank the buildings owner and to hose off the wall of the building when you are finished. Does the amount of Mentos affect the height of the explosion? Your kid may be surprised to learn that the density of coke and diet coke aren't the same! For the Mint Mentos and baking soda trials, the pH of the Diet Coke before and after the reaction was measured by a pH meter with a two point calibration. The hands-on experiment involves dropping several Mentos Chewy Mints into a bottle of Diet Coke, which can cause a stream of the diet cola to shoot many feet If you shake a bottle or can of soda, some of the gas comes out of the solution and the bubbles cling to the inside walls of the container thanks to the tiny pits and imperfections on the inner surface of the bottle called nucleation sites. If you want a more specific measurement, use chalk to mark off 1-foot increments before you drop the Mentos into the bottle of soda. This science demonstration was popular among chemistry teachers back in the 1980s. While science teachers have been dropping candies and mints into 2-liter bottles of soda for years in an effort to release all of the dissolved carbon dioxide, the Mentos and Diet Coke reaction became world-famous in 2005. We compared dropping 16g of Mint Mentos into a 1l bottle of seltzer water (carbonated water), a 1l bottle of tonic water (carbonated water, high fructose corn syrup, citric acid, natural and artificial flavors, and quinine), and a 1l bottle of diet tonic water (carbonated water, citric acid, natural and artificial flavors, aspartame, potassium benzoate, and quinine). The Mythbusters identified the active ingredients in the Diet Coke that contribute to the Mint MentosDiet Coke reaction: caffeine, aspartame, and potassium benzoate, a preservative.1 As shown by the agreement within the 10% experimental error of the mass lost and distance traveled by the sodas spray for Mint Mentos in Diet Coke compared to Mint Mentos in Caffeine Free Diet Coke (see Tables I and II), the presence or absence of caffeine in the beverages contributes little to the reaction. Teachers threaded the roll of Wintergreen LifeSavers onto a pipe cleaner as an easy way to drop all of the LifeSavers into the soda at the same time. Then send your curated collection to your children, or put together your own custom lesson plan. However, the brightly colored Mentos the Mythbusters dropped into the soda had a waxy coating added by the Mythbusters team, not the Mentos manufacturers.1. The kit comes with the essential materials youll need to conduct 6 experiments, take-it-further activities and challenges for 1 4 children per kit. Easy Science for Kids. 2008 American Association of Physics Teachers. This experiment can be visually displayed with photos or videos of the event and a graph of the tables results. I must admit, however, that even with the Baby Soda Bottle method, the results were not very consistent. The Wint-o-Green Lifesavers are rougher than the Mentos by a factor of 5, but the mass lost during these reactions is comparable. This work was supported in part by the College of Arts and Sciences at Appalachian State University, the Petroleum Research Fund, Grant No PRF# 44936-GB5, and an NC Space Grant, New Investigations Award. We have shown here via contact angle measurements that these ingredients reduce the work required for bubble formation, allowing carbon dioxide to rapidly escape from the soda. Of these three highly eruptive reactions, the Wint-o-Green reaction lasted the longest and lost a comparable amount of mass to the others, but traveled a much shorter distance than the Fruit and Mint Mentos reactions. The higher magnification image of the Fruit Mentos is zoomed in on one of the rougher patches. After this, two interested scientists from the entertainment company EepyBird, Fritz Grobe and Stephen Voltz decided to post a Youtube video demonstrating this experiment and it went viral, gaining 120 million views. You might need to put down something flat, like a small piece of wood, to hold it up. During the commercial break, I told Kim what was going to happen and reminded her to pull her hand out of the way of the erupting geyser and to run backward. As the mentos candy sinks in the bottle, the candy causes the production of more and more carbon dioxide bubbles, and the rising bubbles react with carbon dioxide. View the Mentos Geyser Experiment here! A soda geyser is a reaction between a carbonated beverage, usually Diet Coke, and Mentos mints that causes the beverage to be expelled from its container. SEM images of Mint Mentos [(a) and (c)] and Fruit Mentos with a candy coating [(b) and (d)]. Some people fashioned a tube out of paper; others used a piece of plastic tubing to load the Mentos. Based on the Data, the hypothesis of my experiment (If the Diet Coke is heated, then it will have the highest geyser, because the atoms will be moving more rapidly and act as a catalyst) was proven to be correct. https://doi.org/10.1119/1.2888546. Introduce the concepts of chemical bonding, cross-linking of molecules. As luck would have it, the solution to the problem was within arms reach of the Wintergreen LifeSavers in the candy aisle: Mentos chewy mint candies! This low temperature allows the maximum amount of carbon dioxide to dissolve into the soda, keeping the carbonation levels as high as possible. Please follow us on Medium and on Instagram, thanks! Let us know what you observed in your science experiment! WebFound the trial with soda and Mentos at Steve Spangler Science, with tutorial on how at make a huge explosion. The lower magnification image of the Fruit Mentos has smooth patches in contrast to the lower magnification image of the Mint Mentos, but the candy coating is not uniform. Dropping something into the Diet Coke speeds up this process by both breaking the surface tension of the liquid and also allowing bubbles to form on the surface area of the Mentos. Big news media outlets like The Wall Street Journal, Rolling Stone and GQ Magazine wrote about the experiment which helped it become known worldwide like we see today (Grobe & Voltz, n.d.). Position the bottle on the ground so that it will not tip over. ", "Science of Mentos-Diet Coke explosions explained", "Bubble nucleation from gas cavities a review", "Ethanol as a Probe for the Mechanism of Bubble Nucleation in the Diet Coke and Mentos Experiment", "Does the Mentos and Soda Trick Work With Regular Coke? The answer is a process called nucleation (Grobe & Voltz, n.d.). Enough mass was deposited by the Hawaiian hot spot to form the islands, but the eruptions were comparatively gentle.) You want the candies going in the bottle and not falling over the side. [Full Guide] - Cool Youve probably heard that you shouldnt eat Mentos while you drink Coke, but why is that? This will help you make an informed guess as to what will happen. We launched the Mentos Geyser Tube toy at the New York Toy Fair in February 2007. This was the original inspiration behind the Geyser Tube. The participant got it right for $8,000, saying: I saw it on TV, and I bought Mentos and a 2-liter bottle of Diet Coke. Due to the popularity of the Diet CokeMentos reaction as a demonstration of key principles in physics and chemistry, we have investigated the causes of the reaction. First, we learned that the massive buildup of pressure occurs when carbonation causes bubbles to accumulate on the surface of the Mentos. Le Chateliers principle states that, If, to a system at equilibrium, a stress be applied, the system will react so as to relieve the stress.6 In our experiment the stress we are applying increases the temperature of the Diet Coke. In addition to the six outlined experiments, weve included suggestions for further fun, giving your future chemist more opportunities to learn and grow. Lets start with seven Mentos for our first attempt. This experiment investigates if small changes in your diet can alter your basal body temperature. The classic baking soda and vinegar acid-base reaction produces unstable carbonic acid that rapidly decomposes into water and carbon dioxide, which escapes as a gas. The temperature was 52 F. In this experiment, mentos caused a eruption in a 2-liter bottle of Diet Mountain Dew erupted, thus we concluded that diet Mountain Dew The AFM rms roughness measurements are given in Table V. The SEM images of some of the samples are shown in Figs. Conclusion: The Diet Coke reacted to the Mentos, which means the hypothesis was correct. While the reaction remains fairly the same regardless of what carbonated beverage you use for this experiment, diet sodas are usually more carbonated and fizzy compared to regular sodas. These claims are also supported by data from the liquid gum arabic trials. The scale bar for (a) is 100m and for (b) is 20m. This will count as your control group. The beloved coke and mentos experiment is a perfect opportunity for young children interested in science to learn about the basics of acid and base reactions. Observe and explain the Mentos and Diet Coke experiment. The only variable youll change in this test is the brand of soda; everything else will remain the same. Notice how bubbles immediately form on the surface of the object. You can also use a Baby Soda Bottle to hold the Mentos or a Geyser Tube, which was invented to solve this very problem. WebFound the trial with soda and Mentos at Steve Spangler Science, with tutorial on how at make a huge explosion. However, the importance of the presence of surfactants in the Mentos cannot be denied. From after-school activities and science classroom activities to STEM club experiments, our website is one of the most trusted resources for fun, age-appropriate experiments for kids of all ages. Carbon dioxide is the chemical compound that consists of two oxygen atoms bonded to a carbon atom. Part of his assignment Is to ask a professional about his experiment. WebMentos and Diet Coke Experiment. Does one brand produce higher geysers? https://www.scientificamerican.com/article/bring-science-home-coke-mentos/. (As discussed, part of the reason that the Wint-o-Green reaction took more time is due to the increased fall times.) Amazing Facts About Diet Coke And Mentos Experiment. There really arent that many supplies you need to make a mentos and coke volcano. The scientific method is an important way scientists make observations and come to conclusions. By the end of the 1990s, however, the manufacturer of Wintergreen LifeSavers increased the size of the mints (no one was ever certain why). This was demonstrated in an experiment that tested 15 types of carbonated beverages with Mentos. Compare the contact angle results in Table V for pure water (=85), sugar water (=80), and aspartame dissolved in water (=77). For the MentosDiet Coke reaction, the carbonic acid and carbon dioxide are not products of a chemical reaction but are already present in the Diet Coke, whose equilibrium is disturbed by the addition of the Mentos. Gruber, B. American Crystallographic Association, Inc. AVS: Science and Technology of Materials, Interfaces and Processing, www.stevespanglerscience.com/experiment/00000109, Paragliders' launch trajectory is universal, On the bifurcation behavior of a folded notebook page, Rosalind Franklin's X-ray photo of DNA as an undergraduate optical diffraction experiment, Introducing quantum mechanics through its historical roots: The hydrogen Rydberg atom viewed through the lens of the old quantum theory, The discovery of a supermassive black hole at the center of the Milky Way galaxy, Sensory evaluation and electronic tongue analysis for sweetener recognition in coke drinks. The warmer the liquid, thelessgas can be dissolved in that liquid. Why do Mentos turn ordinary bottles of diet soda into geysers of fun? A one gallon bucket containing test tubes of over 10 Spangler Labs originals, Features favorites like Insta-Snow, Energy Beads, Jelly Marbles, & Magic Sand. Some of the samples, such as the table salt, molecular sieve beads, and the sand grains, were too rough to image in our AFM, which has a 24mz range. As soon as the Mentos hit the soda, bubbles cling to the surfaces of the candies and then quickly rise to the surface of the liquid. Its true that putting Mentos into a bottle of Coke will cause an impressive geyser of soda to erupt from the bottle. It needs to be wide enough to use as loader for the Mentos. Observe the eruptionheight, trajectory, duration, etc. 2023 Cool Kid Facts. What exactly happens when you mix Mentos and Coke? Which is the best 150 Ah inverter battery? [2], The nucleation reaction can start with any heterogeneous surface, such as rock salt, but Mentos have been found to work better than most. Now remove the index card and let candies fall in and step away from the Mentos and coke volcano. Once youve got your location squared away and your supplies gathered, carefully open the bottle of diet soda. Longer lasting carbonation bubbles, therefore, increases the height of the bubble geyser that forms a mentos and coke reaction. We found that the max amount of mentos with the largest The Diet WebFun Science Experiments // Mentos and Coke / Soda ExperimentIncludes BOTH US size and Australian A4 sized files/spelling!This fun experiment explores the physical reaction between mentos and diet coke / diet soda creating an impressive geyser of carbon dioxide. What is the conclusion of Coke and Mentos? Youll need a thermometer to record the temperature of the soda just before you launch it so that your data are accurate. Why does the reaction happen? While I had performed variations of the Mentos Geyser Experiment on television many times from 2001 to 2004, my performance of the demo in the backyard of Denvers NBC affiliate KUSA-TV in September of 2005 proved to be the tipping point. Beware of the 20-foot stream of soda that will erupt when you pull off this experiment. In addition to the six outlined experiments, weve included suggestions for further fun, giving your future chemist more opportunities to learn and grow. We enable strictly necessary cookies to give you the best possible experience on Education.com. Coke has a pH of 2.3 and it made intuitive sense that an acid-base reaction could explain the sudden explosion of sugar. Note that the contact angles for Diet Coke and Caffeine Free Diet Coke are not very different. students used this simple device to monitor the kinetics of foam production in the Diet Coke and Mentos experiment and to draw conclusions about the system. Conclusion: The more mentos you put in a bottle of pop does not necessarily mean a larger explosion. Write down what you think will happen when placing the Mentos in the soda. For the reaction between Diet Coke and the molecular sieve beads, the lower limit on the duration of this reaction was 12s, a much longer time than all of the other reactions.
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