Soda Physics

Sodas in the refridgerator are there to get cold. You may have noticed that if you put a new bottle of soda in the refridgerator it won't become cold as quickly as a soda that has been opened before. This is because a new bottle of soda has a higher pressure than an opened bottle.

The Ideal Gas Law explains that the pressure of the bottle multiplied by the volume of the bottle is equal to the number of moles contained multiplied by the gas constant multiplied by the temperature.

Since a full soda bottle's contents will always have the same volume, the same number of moles, and the gas constant is... well it's constant, we can say that the pressure of the bottle is directly proportional to the temperature of the bottle. The higher the pressure is, the higher the temperature must be. This means that a refridgerator has less of an effect on a bottle that has not been depressurized.

I want cold soda, and I want it sooner rather than later. It helps if you unscrew the cap once before putting a new bottle of soda in the refridgerator.