[cuongt]

i dont know where to start with this question

sealed bottles of "fizzy" drinks such as coke and sparkling wines contain carbon dioxide gas in equilbrium with disolved carbon dioxide:
CO2(g) <----> CO2(aq)    the forward reaction is exothermic
a) use Le chatlier's principle to explain why bubbles appear when bottle are opened
b) why are drinks usually cooled before they are carbonated.

ty in advanced   ;

[Dan]

a) think about pressure
b) think this is about the enthalpy of solvation of carbon dioxide

[Donaldson Tan]

When you open up the bottle, the pressure inside drops. Le Chatelier's Principle (LCP) would therefore require the chemical system to respond in such a way that increases the pressure. This means the position of the equilibrium shifts to the right, to produce carbon dioxide gas, and hence the fizz...

According to LCP, which reaction is favoured by low temperature - endothermic or exothermic?

[Morphic flip]

CO2(g) <----> CO2(aq)    the forward reaction is exothermic

why are drinks usually cooled before they are carbonated.

You`ve unknowingly answered the question.