Warm sodas do seem to have more fizz, don't they?
Actually, bottled soda doesn't gain any
carbonation when it's warm. The people that make
soda dissolve CO2 into the soda at cold
temperatures. CO2 (carbon dioxide, a
gas) is what gives soda its bubbles.
CO2 dissolves into cold liquids better
than warm liquids. When you warm the soda up, all
the CO2 that was added when the liquid
is cold wants to escape, so the soda seems
fizzier. One term you might want to look up is
vapor pressure to help you understand what is
going on even better.
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