The temperature of a gas decreases when the pressure _ at constant volume

Answer: decreases

The temperature of a gas decreases when the pressure decreases at constant volume

Explanation:

The statement of Pressure Law states that the pressure of a given mass of gas is directly proportional to its absolute temperature provided the volume is kept constant.

Mathematically, it is expressed as

P α T

P = kT

or P/T = k

Thus, the direct proportionality of temperature and pressure makes temperature of a gas decreases when the pressure decreases and increases when pressure increases.