Watercooler diet coke mentos
It is highest for bubbles that form in the liquid itself (homogeneous nucleation), and lower if the bubble forms on some other surface ( heterogeneous nucleation ). Measurements of the pH of the Coke before and after the experiments showed that its acidity did not change, ruling out the idea that a simple acid-base reaction drives the fountains. The startling reaction between Diet Coke and Mentos sweets, made famous in thousands of YouTube videos, finally has a scientific explanation. But caffeine-free Diet Coke did just as well, suggesting that caffeine does not accelerate the reaction, at least at the normal levels in the drink. Theories abound as to why this happens, with some bloggers speculating that it is an acid-base reaction because Coke is acidic. They also compared reactions using other fizzy liquids such as caffeine-free and sugary colas, as well as soda water and tonic water. Experiments in a 2006 edition of the Discovery Channel programme Mythbusters suggested the chemicals responsible for the reaction are gum arabic and gelatine in the sweets, and caffeine, potassium benzoate and aspartame in the Coke. By Hazel Muir Video: The explosive reaction produced by adding Mentos to Diet Coke has at last been explained. But there have been no rigorous scientific studies of the reaction until now. But because they are smooth and clean, the activation energy is still relatively high, and the process is slow. The results showed that Diet Coke created the most spectacular explosions with either fruit or mint Mentos, the fountains travelling a horizontal distance of up to 7 metres. The tubes of candies were threaded onto a pipe cleaner and dropped into the soft drink to create a geyser.
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The eruption is caused by a physical reaction, rather than any chemical reaction. The activation energy for a process like bubble nucleation depends on where the bubble forms. Normally, this process is relatively slow, because the activation energy for this process is high. The addition of other nucleation sites provides an alternate pathway for the reaction to occur with lower activation energy, much like a catalyst. In the 1980s, Wint-O-Green Life Savers were used to create soda geysers. To find out more, Coffey and a team of students tested the reactions between Diet Coke and fruit Mentos, mint Mentos, and various ingredients such as other mints, dish-washing detergent, table salt and sand. The solution becomes supersaturated with carbon dioxide when the bottle is opened, and the pressure is released. When the pressure is released from a soda bottle, the bubbles tend to form on the sides of the bottle. Carbonated sodas contain elevated levels of carbon dioxide under pressure. SUBSCRIBE AND SAVE 48% MANAGE MY ACCOUNT STUDENT Schools and universities GIVE A GIFT. Under these conditions, carbon dioxide begins to precipitate from solution, forming gas bubbles. From left to right: action of five Mentos candies (per bottle) with Perrier, classic Coke, Sprite and Diet Coke. At the end of the 1990s the manufacturer of Wintergreen Lifesavers increased the size of the mints and they no longer fit in the mouth of soda bottles. Watercooler diet coke mentos video:
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