conclusion for coke and mentos experiment
WebPut 5 room temp Mint Mentos in a geyser tube. 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. Write down what you think will happen when placing the Mentos in the soda. 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. 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. If the bubbles must travel farther through the liquid, the reaction will be more explosive. 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. When you pull your finger out of the way, all seven Mentos should fall into the bottle at the same time. What is the independent variable in Coke and Mentos experiment? Youll need a thermometer to record the temperature of the soda just before you launch it so that your data are accurate. Then send your curated collection to your children, or put together your own custom lesson plan. Lee Marek and Mareks Kid Scientists performed the Diet Coke and Mentos experiment on the Late Show with David Letterman in 1999. 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. Do they make motorcycle helmets for kids? Something else to consider about diet sodas is that they tend to be less sticky when released out in the open. So aspartame causes the most mass lost. 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. Spurting Science: Erupting Diet Coke with Mentos. So, if you want some quick and easy fun, get some paper towels becausewere about to make a sweet mess. Lets start with seven Mentos for our first attempt. Fortunately, the maker of Mentos (Perfetti Van Melle) also liked our Geyser Tube design. Try placing the soda bottle next to the wall of a brick building, after getting permission from the buildings owner, of course. Does one brand produce higher geysers? (As discussed, part of the reason that the Wint-o-Green reaction took more time is due to the increased fall times.) How Does Diet Affect Your Body Temperature? It is very simple to do and requires minimal tools and equipment to execute correctly. Do they still make PHILADELPHIA cheesecake filling. In conclusion the hypothesis that the diet coke will have the greatest explosion because of the high level of CO2 gas contained in it was correct. At the time, my solution was to load the Mentos candies into something called a Baby Soda Bottle a test tube-like container that held an entire roll of Mentos perfectly. 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 that is still dissolved in the soda to cause more carbon dioxide to be freed and create even more bubbles, resulting in the eruption. We launched the Mentos Geyser Tube toy at the New York Toy Fair in February 2007. Heres the question we came up with: In an experiment popularized online, what candy creates an explosive geyser when dropped into a 2-liter Diet Coke bottle? The results in Table II are comparable to results from previous studies.3 Two to four trials were done for each sample-soda combination. If you want to examine the volume of the geyser, note the volume of a full bottle of soda before you drop the Mentos into it. 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. Record the temperature. 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. [25] These results suggest that additives serve to enhance geyser heights not by decreasing surface tension, but rather by decreasing bubble coalescence. Its true that putting Mentos into a bottle of Coke will cause an impressive geyser of soda to erupt from the bottle. [10] As another example, dropping grains of salt or sand into the solution provides Type IV nucleation sites, lowers the activation energy compared to that of homogeneous nucleation, and increases the rate of carbon dioxide degassing. Most importantly, the author would like to thank the students of PHY2210 for their hard work and great ideas, including Will Beuttell, Jason Burch, Blake Clark, Robert Duke, Jama Greene, A.J. In fact, its not really a reaction at all or at least its a physical reaction rather than a chemical one. What is the dependent variable of Coke and Mentos? What happens when you mix Diet Coke and Mentos? The diet coke erupted like a volcano. Carbon dioxide is the chemical compound that consists of two oxygen atoms bonded to a carbon atom. So, when a Mento is dropped into some Coke, the acidity of the soda mixture quickly dissolves its shell, releasing the chemicals. The solution becomes supersaturated with carbon dioxide when the bottle is opened, and the pressure is released. Diet Coke and Coke Zero react better with Mentos than regular Coke does because of the absence of sugar. Then, make comparisons, create a chart with your data and draw your conclusions. Write down what happened when you dropped the Mentos in the coke. Place the index card and candies over the mouth of the bottle. [21][29], Additional explanations for why diet sodas outperform regular sodas in this experiment have been proposed. The average amount of mass lost for the various combinations of soda and samples is given in Table I. Average horizontal distance traveled by the spray during the reaction. 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. Longer lasting carbonation bubbles, therefore, increases the height of the bubble geyser that forms a mentos and coke reaction. We used a video camera to measure the time it took for Mentos, rock salt, Wint-o-Green Lifesavers, and playground sand to fall through water from the top of the water line to the bottom of a clear 2l bottle. . The contestant ended up doing really well, going all the way to the $250,000 question; however, he walked away with $125,000. 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. Under these conditions, carbon dioxide begins to degas from the solution, forming gas bubbles. 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. We put 4 mentos pieces into the bottle of diet coke. Make your Mentos drop easier and your geyser spray higher with the Geyser Tube! Quantitative Observation Be sure that the soda bottles are all the same brand and type. Dog Diets: Will a Dog Prefer Homemade Dog Food? 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. It is clear from Table V that the roughness of the sample is a major contributor to the explosiveness of the reaction. Everyone found their own method for quickly dropping the Mentos into the soda. What is the conclusion of Coke and Mentos? The uncertainties are approximately 10%. 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. Sample contact angle images for (a) deionized water, (b) deionized water with added aspartame, and (c) deionized water with added potassium benzoate. 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. For example, it has been suggested that the higher viscosity of regular sodas as compared to diet sodas could inhibit the formation of the fountain in regular sodas, leading to shorter fountains. Monday Friday Repeat steps 4-6 for Diet Figure 1(a) qualitatively demonstrates that the small cubic table salt grains have a high surface area to volume ratio, thus providing many growth sites for the carbon dioxide in the Diet Coke. 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. When you open the container, the bubbles quickly rise to the top, pushing the liquid out of the way, so liquid sprays everywhere. Well even provide all the seeds and dirt you need for your exploration into the world of plants. 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. 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. The Mentos Geyser Experiment became one of my featured demonstrations both on television and during my live stage presentations. Everyone wants to know how many Mentos make the highest shooting geyser. Then, observe, record and report the results. Does Colorado have a defensive driving course? 4, and some of the AFM images are shown in Figs. Unfortunately, Kim got so caught up in the fun that she forgot to do both and got soaked in Diet Coke on live television! [22] The foaming is aided by the presence of food additives such as potassium benzoate, aspartame, sugars, and flavorings in Diet Coke,[20] all of which influence the degree to which water can foam. The Fruit Mentos and the Mint Mentos reaction lost roughly the same amount of mass, but the Fruit Mentos reaction took place over a shorter time and therefore the spray traveled much farther than the Mint Mentos reactions. Average mass lost during the reaction. What is the aim of the Coke and Mentos experiment? Its also a lot less work than your classic paper mache volcano. Grobe, F., & Voltz, S. The Science of Coke and Mentos. Mentos candies contain millions of cavities, roughly 1-3 m in size,[25][10] that remain unwetted when added to a soda. St. Helens and Mt. Thats why its called a Baby Soda Bottle! The scale bars represent the following lengths: (a) 2.0mm; (b) 100m, (c) 50m, and (d) 20m. The AFM rms roughness measurements are given in Table V. The SEM images of some of the samples are shown in Figs. You can also use a Baby Soda Bottle to hold the Mentos or a Geyser Tube, which was invented to solve this very problem. The Diet CokeWint-o-Green reaction loses more mass and the spray travels farther than the Diet Cokerock salt reaction. There is not always a direct correlation between the mass lost and the distance traveled for the reactions. Try dropping an object, like a raisin or a piece of uncooked pasta, into a glass of soda. These tiny pits act as nucleation sites, which are perfect for carbon dioxide bubbles. Coke possesses been which preferred mark through all other coke, spite one preference for Pepsi in blind taste tests. Decide who will do what, so you will be ready when its your turn. ", "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? WebCONCLUSIONS: ( Do you accept or reject your hypothesis, and why or why not) You and your partner will share your experiment with the class. This procedure prevented the explosion of the bottle during heating, but the early release of some of the carbon dioxide gas may have caused these reactions to be less explosive than the cold or room temperature trials. The lack of change in the pH supports the conclusion that the Mint MentosDiet Coke reaction is not an acid-base reaction. This demonstration illustrates many important ideas in physics, including key principles in thermodynamics, surface science, and the physics of eruptions.