Which law describes the relationship of gas volume and temperature at constant pressure?

Charles' Law describes the relationship between the volume of a gas and its temperature at constant pressure. According to this law, the volume of a gas is directly proportional to its absolute temperature (measured in Kelvin) when pressure is held constant. This means that if the temperature of a gas increases, its volume will also increase, assuming the pressure does not change. Conversely, if the temperature decreases, the volume will decrease.

This relationship is often expressed with the formula V1/T1 = V2/T2, where V is the volume and T is the temperature. This law is fundamental in understanding how gases behave under varying temperature conditions, which is particularly relevant in many applications, including diving physics where gas laws help predict changes in gas volume and pressure in relation to temperature fluctuations.

In contrast, other laws mentioned focus on different aspects of gas behavior. For example, Boyle's Law relates to the inverse relationship between pressure and volume at constant temperature, and Dalton's Law deals with the pressures of mixtures of gases. Archimedes' Principle pertains to buoyancy and is not applicable in the context of gas volume and temperature.