Eli5 If putting something under pressure increases the temperature why is the bottom of the ocean so cold?

Question

Eli5 If putting something under pressure increases the temperature why is the bottom of the ocean so cold?

In: 561

Answer 1

Compressing something increases the temperature.

So, if you’ve got air at atmospheric pressure and compress it to a higher pressure, you will change its temperature.

However, if you leave that pressurized air in the bottle, the heat will be conducted out until the temperature of the pressurized air is equalized with the ambient temperature.