Cancer Research Uk . (Closes June 15Th)
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It depends what you mean by "fizzes more". (And I take it you mean 'in colder or warmer conditions')
The 'fizz' is the gas carbon dioxide, CO2, in solution (ie dissolved) in the water based drink.
More CO2 can dissolve (and remain in solution) in a cold drink than in a warm one. So, take two identical unopened cans, each contains the same amount of gas and liquid. One can is put in the fridge and one left on a sunny windowsill. In both cans the gas is held in solution because they are under pressure.
When the cans are opened, the warmer can fizzes and froths up alot more than the cold one. This is because the warm liquid can not hold as much dissolved CO2 as the cold one, and as soon as the pressure is released, (opening the can) the gas comes out of solution quickly (exsolves). This will cause the drink to taste 'flat'.
With the cold can, the CO2 exsolves more slowly, as the cold liquid can hold, and keep dissolved, more gas. The drink will therefore taste 'fizzier' for longer.
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