Well, its probably not pretty. [3] Steve Spangler's televised demonstration of the eruption in 2005 became popular on YouTube,[4][5][6] launching a chain of several other Diet Coke and Mentos experiment viral videos. Decreased bubble coalescence leads to smaller bubble sizes and greater foaming ability in the water. Warning - you are about to disable cookies. Did what you hypothesize happen? The lower magnification images show large surface areas and small volumes, especially when compared to samples such as a Mentos, which is 12cm in diameter. [16] In October 2010, a Guinness World Record of 2,865 simultaneous geysers was set at an event organized by Perfetti Van Melle at the SM Mall of Asia Complex, in Manila, Philippines. Originally it was thought that the colossal fountain of soda spraying out of the bottle was caused by the caffeine in Coke. The question in the What is the dependent variable in Coke and Mentos experiment? 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. The uncertainty of the fall times was roughly 10%. Measure the height of the geyser by counting the number of bricks that are wet once the geyser stops. Open the soda bottle, set it down and write down what you observe about it. Metastable Liquids: Concepts and Principles. Compare the contact angle results in Table V for pure water (=85), sugar water (=80), and aspartame dissolved in water (=77). Rough candy Measurements showed that the surface tension in water containing the sweetener aspartame is lower than in sugary water, explaining why Diet Coke creates more dramatic fountains than sugary Coke. 1 and 3. Start by opening the cold bottle and dipping the thermometer into the soda. Carbon dioxide creates the bubbles in soda. The results in Table II are comparable to results from previous studies.3 Two to four trials were done for each sample-soda combination. The winning Geyser Tube design was a clear plastic tube with a special fitting that twisted onto any soda bottle. This is why bottling plants pump carbon dioxide into the cans or bottles when the fluid is just above freezing, usually around 35 degrees Fahrenheit. The scale bar for (a) is 100m and for (b) is 20m. Based on these SEM images and our inability to image the samples in the AFM due to the limits on our z range, we assume that these samples have a roughness greater than those reported in Table V. Although these samples are rough, the fall times through the bottle, the duration of the reaction, and the lack of a surfactant contributed to a less impressive eruption for these samples. Conclusion: The more mentos you put in a bottle of pop does not necessarily mean a larger explosion. This made the diameter of the candy too large to fit into the mouth of the soda bottle. As they say, the rest is history. That year, the grist being run through the rumor mill included the sad tale of a misadventuring tot who had gulped soda and ingested Pop Rocks, a carbonated candy known for producing a fizzling sensation in the mouth. All of our results seem to contradict the aforementioned Mythbusters experiment. Superabsorbent giant growing polymer beads that absorb 150 times their weight in water! The solution becomes supersaturated with carbon dioxide when the bottle is opened, and the pressure is released. What Will I Need For The Mentos And Coke Volcano? When the candy hits the bottom of the bottle, the gas is released and pushes the soda from the bottle up in the air in an amazing eruption! Search for other works by this author on: Mentos and the scientific method: A sweet combination. Its time to return to your launching site. Dont miss our other super-fun and hands-on experiments in our huge online experiment library! What would happen if you had Coke and Mentos? So, if you want some quick and easy fun, get some paper towels becausewere about to make a sweet mess. This must been coined as the Pepsi Paradox. The quantitative roughness information detailed in Table V was taken from this image. As the molecules move faster, they diffuse out of the liquid, leaving less gas dissolved in that liquid. Average mass lost during the reaction. 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.). Hall, Magdalena Jaramillo, Cully Little, and Zach Russell, and my graduate research assistant, Jon Jones. The basic science of the Coke and Mentos reaction is fairly straightforward. What soda has the biggest reaction to Mentos? Soda is made of sugar or artificial sweetener, flavoring, water and preservatives. [2][10][23][24] When dissolved gas diffuses into bubbles that already exist in a liquid, it is called Type IV bubble nucleation. In the Mentos and Diet Coke experiment, Arnold was trying to prove that the Diet Coke would explode if he put 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. https://www.scientificamerican.com/article/bring-science-home-coke-mentos/. When the gum arabic was injected at the bottom of the bottle, 100g of mass was lost. If the growth of carbon dioxide bubbles on the sample takes place at the bottom of the bottle, then the bubbles formed will detach from the sample and rise up the bottle. In colder liquids, the gas molecules move very slowly, causing them to diffuse out of the solution much more slowly, leaving more gas in the solution. And you may not have a friend for a day or two until they forgive you. Under these conditions, carbon dioxide begins to degas from the solution, forming gas bubbles. The next few months were spent building trigger devices that ranged from plastic tubes with sliding doors and magnets that held metal stoppers in place to an elaborate battery-operated switch that was triggered by a motion detector. What is the hypothesis for the Diet Coke and Mentos experiment? Toll Free: 800-223-9080 Fortunately, the maker of Mentos (Perfetti Van Melle) also liked our Geyser Tube design. Longer distances traveled by the bubbles resulting in a more explosive reaction also partially explains the differences in explosive power for whole Mentos in contrast to crushed Mentos; the smaller particulates of the crushed Mentos fall through the liquid more slowly. ), Vampire Slime Light Sensitive Color-Changing, STEM Science Kit: Amazing Scientist Chemistry Kit, Big Bucket of Science Test Tube Experiments, A roll or box of Mentos chewy mints (stick with the standard mint flavor for now), 2-liter bottle of diet soda (either diet or regular soda will work for this experiment, but diet soda is not sticky when youre cleaning it up, and it will usually create a bigger blast). Henrys law applies to gases dissolved in liquids, such as the carbon dioxide gas dissolved in Diet Coke and other sodas. Diet Coke and Coke Zero react better with Mentos than regular Coke does because of the absence of sugar. You can also place the bottle of unopened soda in a bucket of warm water. Grobe, F., & Voltz, S. The Science of Coke and Mentos. 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. It comes with six fun experiments, a test tube rack, fizzing tablet and vegetable oil chemicals to play around with. It is difficult to find beverages containing aspartame that do not contain a preservative such as potassium benzoate. What is the independent variable in the Mentos experiment? Is there another way for the carbon dioxide to escape? Then, observe, record and report the results. Muir, H. (2008, June 12). Thus, adding Mentos candies to a carbonated beverage introduces millions of nucleation sites into the drink, which allows for degassing that is rapid enough to support a jet of foam out of a bottle. WebThis is a fun and exciting experiment designed for 3rd-6th graders. It is very simple to do and requires minimal tools and equipment to execute correctly. WebWhen Mentos candies are dropped into a bottle of Diet Coke, a foamy fountain jets out of the beverage container. Tobin, Declan. Once your Mentos are lined up and ready to drop, its time for the fun to begin. The independent variable to this experiment is the Mento because it could stand alone and it does not depend on. We knew the Mentos Geyser Experiment was a popular experiment when a producer from ABCs Who Wants to Be a Millionaire called for help when writing a question. It might seem surprising that the Fruit Mentos perform as well or better than the Mint Mentos. Carbon dioxide is the chemical compound that consists of two oxygen atoms bonded to a carbon atom. Bubble nucleation and growth in carbonated beverages almost always occur by heterogeneous nucleation: diffusion of carbon dioxide into pre-existing bubbles within the beverage. The goal is to drop all seven Mentos into the bottle of soda at the same time, which is trickier than you might think. Quantitative Observation Observe each eruption, recording the details and compare the results. WebThis product walks you through the scientific method using two different experiments: -- How different types of soda react when Mentos is added to them- How Coke reacts to Mentos vs. how it reacts to baking sodaStudents will make an observation, ask a question, create a hypothesis, conduct an experiment, record results, and write a conclusion. 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). Mentos Geyser Experiment Mentos & Coke Experiment. Using any more than seven Mentos mints is just a waste, according to these soda-soaked science enthusiasts. http://www.eepybird.com/featured-video/coke-and-mentos-featured-video/science-of-coke-mentos/. The pressurized conditions of the bottle and the surface tension of the water keep the gas in solution, even though it wants to escape (the gas that escapes makes the fizzy sound you hear when you open the bottle) (Science Buddies, 2012). The scientific method is an important way scientists make observations and come to conclusions. 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 Mentos and Coke Experiment How to Do It! ", "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? Set up three tests: warm soda, room temperature soda and cold soda. height In this experiment, you will evaluate whether or not a diet that is supplemented with "brain-enhancing" foods can help improve memory. Making science accessible and fun for youth. 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! Buddies, S. (2012, June 14). 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. These tiny pits act as nucleation sites, which are perfect for carbon dioxide bubbles. Drop two Mentos into the second bottle and continue increasing the number until youve completed the experiment with all 10 bottles. It truly is the perfect chemistry kit for kids who want to explore. It needs to be wide enough to use as loader for the Mentos. Conclusion: The conclusion is a brief summary of the main findings of the study and their implications. Pepper has the strongest reaction. What is the conclusion of Mentos and Coke experiment? We found that the max amount of mentos with the largest explosion was 4 mentos, it went 350 cm high. Mentos and Diet Coke Experiment. This science kit seeks to challenge kids to solve problems in creative ways that will prepare them for future science classes and nurture their lifelong imagination. Stir up some enthusiasm for experimentation with this candy-cracking science experiment! Have you ever taken a can of soda, shook it up, and given it to your friend? Mentos candies contain millions of cavities, roughly 1-3 m in size,[25][10] that remain unwetted when added to a soda. Why Do Flight Attendants Hate Serving This Drink to Passengers in Flight? Then, make comparisons, create a chart with your data and draw your conclusions. The carbon dioxide attaches throughout the bead, increasing the amount of time over which the reaction occurs. [25] These results suggest that additives serve to enhance geyser heights not by decreasing surface tension, but rather by decreasing bubble coalescence. Today Room 1 and 5 did a science experiment together. These claims are also supported by data from the liquid gum arabic trials. Place the second bottle in a place where it will reach room temperature overnight. All fizz shooting out in one strong plume. The students designed the experiment, did almost all of the data acquisition, and disseminated their results in a poster session at our spring Research and Creative Endeavors Day at Appalachian State University. In an experiment, you have two groups: an experimental group, and a control group. The Hypothesis. There really arent that many supplies you need to make a mentos and coke volcano. Easy Science for Kids. The bubbles then act as growth sites, where the carbon dioxide still dissolved in the solution moves into the rising bubbles, causing even more liberation of carbon dioxide from the bottle. If we assume that LV is similar for Diet Coke and Caffeine Free Diet Coke, then the work required for bubble formation for Diet Coke is 90% of the work required for bubble formation for Caffeine Free 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. As they say, the simplest design usually turns out to be the best and most elegant solution to the problem. 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. A more dramatic effect is the rate of the reaction. Team students up and have them collaborate to figure out chemistry experiments or give your own kids a fun, rainy day activity that will get them excited about learning. My son chose this experiment for his 6th grade science fair project. Conclusion: The Diet Coke reacted to the Mentos, which means the hypothesis was correct. In addition to the six outlined experiments, weve included suggestions for further fun, giving your future chemist more opportunities to learn and grow. This increase means that the molar concentration of the gas in the solution must drop for the same value of the partial pressure, which implies that gases become less soluble in liquids as the temperature increases. Decide who will do what, so you will be ready when its your turn. The activation energy for the release of carbon dioxide from Diet Coke by the addition of Mentos is 25 kJ mol1. Language links are at the top of the page across from the title. Be sure that the soda bottles are all the same brand and type. This size image was chosen for comparison between samples because the samples imaged were quite rough and had significant curvature, and images larger than 100squarem often resulted in a z range larger than 24m. Within the next 12 months, over 800 Mentos Geyser Experiment-related videos were posted on YouTube, making the demo one of the most popular pop-culture science experiments in recent history. What is a good hypothesis for Mentos and Diet Coke? The Coke and Mentos Experiment is an easy science experiment to do with kids of all ages. Even toddlers and preschoolers will shriek with delight as they watch this chemical reaction take place. Use the hot glue gun to glue 7 - 8 mentos together. This is optional, it just helps to add all of the mentos into the bottle at the same time. So when a bottle of soda is opened, the partial pressure drops, and the molar concentration of the gas must also drop, which is why sodas go flat over time after they are opened. The dependent variable was the height of the rise of Coca-Cola. 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. https://easyscienceforkids.com/diet-coke-and-mentos-video-for-kids/. Average horizontal distance traveled by the spray during the reaction. The quantitative roughness information detailed in Table V was taken from this image. The average times were 0.7s for the Mentos, 1.0s for the rock salt and the Lifesavers, and 1.5s for the sand. The Diet Coke and Mentos experiment results from the nucleation of carbon dioxide from liquid to gas. Sticking a finger into a glass of soda will result in the formation of tiny bubbles full of carbon dioxide that stick to the skin. Repeat steps 4-6 for Diet Its also important that all of the test bottles are stored in the same place so that the liquid in each bottle is the same temperature. What is inside Mentos and Cola that reacts with each other causing the eruption? Once the geyser stops, measure how much liquid is left inside. The pH of the diet Coke prior to the reaction was 3.0, and the pH of the diet Coke after the mint Mentos reaction was also 3.0. Today Room 1 and 5 did a science experiment together. Each bottle tested had a two-litre capacity, and eleven Mentos were introduced to each bottle. The blend of Coke Zero and Mentos just works out the strongest. ), A tube the width of the Mentos. 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. Contact mode AFM image of Mint Mentos. . WebKids TV Yenu and Sanu is home to gaining knowledge & entertain toddlers. Turns out that diet coke, which gets its sweetness from artificial sweeteners such as aspartame, is more commonly used than its regular counterpart. From our results in Tables I and II we see that the rock salt performance far exceeds the table salt performance, even though the surface area to volume ratio (and hence the number of bubble growth sites per gram) is larger for the table salt. If the bubbles must travel farther through the liquid, the reaction will be more explosive. It truly is the perfect chemistry kit for kids who want to explore. A study in the US has identified the prime factors that drive the fizzy plumes from Coke bottles: the roughness of the sweet and how fast it plummets to the bottle's base. Experiment with your sense of taste and your sense of smell with this simple experiment! Watch as they vanish right before your eyes in water as they grow. Or, attach plastic piping or tubing to extend the openings neck. Why does Diet Coke and Mentos explode more than regular Coke? It should not introduce any new information, but rather summarize the key points made in the discussion section. 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. The hypothesis was that if unaltered mentos were dropped into coke, then they would create a more explosive reaction than any of the altered mentos. What is the science behind Coke and Mentos for kids? Learn all about the secrets that make seeds grow and the conservation power of Water Jelly Crystals. Spanish-English dictionary, translator, and learning, Marketplace for millions of educator-created resources. 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. To get the best results in a science experiment, you will need to standardize the test conditions as much as possible. The Diet CokeWint-o-Green reaction loses more mass and the spray travels farther than the Diet Cokerock salt reaction. 13, contact angle images are shown in Fig. The answer is a process called nucleation (Grobe & Voltz, n.d.). [2], The nucleation reaction can start with any heterogeneous surface, such as rock salt, but Mentos have been found to work better than most. Hypothesis: If the amount of soda in the bottle decreases, then the height of the plume and velocity of the liquid will also decrease because there will less liquid with which the Mentos can react. A 10% difference is comparable to the uncertainty in our experiments, and hence it is difficult to observe significant differences in the results for Diet Coke compared to Caffeine Free Diet Coke. 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. We use cookies to ensure that we give you the best experience on our website. These bubbles rapidly expand and are From Table III we see that higher temperatures lead to larger eruptions. Hypothesis: The larger the number of mentos, and the warmer the temperature of the soda, the higher the reaction will be. ", "Orchestrated Chaos: A Mentos Tribute to Eepybird.com", About.com Chemistry page with instructions, "Watch Scientists Conduct the Mentos and Diet Coke Experiment at 14,000 Feet", "Diet Coke and Mentos: What is really behind this physical reaction? Figure 1(c) is a magnified view of the edges of a salt grain, and Fig. It has also been shown that a wide variety of beverage additives such as sugars, citric acid, and natural flavors can also enhance fountain heights. He would like to know why does the shape and size of the mentos affect the outcome of the project. The Mentos mints then dropped into the soda. 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.
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