At constant volume, the pressure of a fixed mass of gas is directly proportional to its absolute temperature. This is

Explanation

Gay-Lussac's law covers the pressure temperature relationship at constant volume, and it explains why a sealed aerosol can explode when heated. Boyle's law fixes temperature and relates pressure to volume, while Charles's law fixes pressure and relates volume to temperature. Each law holds one variable constant, which is the quickest way to tell them apart.