Which law describes the behavior of gas pressure with temperature at constant volume?

The behavior of gas pressure in relation to temperature at constant volume is accurately described by Gay-Lussac's Law. This law states that the pressure of a gas is directly proportional to its absolute temperature when the volume of the gas is kept constant.

This relationship can be expressed mathematically as ( P \propto T ) or ( \frac{P}{T} = k ), where ( P ) is the pressure, ( T ) is the absolute temperature (in Kelvin), and ( k ) is a constant for a given amount of gas at a fixed volume. Therefore, if the temperature of the gas increases, the pressure also increases proportionally, assuming the volume does not change.

In contrast, Charles's Law specifically addresses the relationship between the volume and temperature of a gas at constant pressure. Boyle's Law reveals how the pressure of a gas changes in relation to its volume while the temperature remains constant. Avogadro's Law involves the volume of gas in relation to the number of moles at constant temperature and pressure. Hence, Gay-Lussac's Law is the suitable choice for describing the scenario of gas pressure changing with temperature while keeping the volume constant.