Which law states that the volume of a gas increases as its temperature increases when pressure is kept constant?

The principle that describes the relationship between the volume of a gas and its temperature at constant pressure is encapsulated in the combined law attributed to Charles and Gay-Lussac. This law states that the volume of a gas is directly proportional to its temperature measured in Kelvin when the pressure remains constant. Therefore, if the temperature of the gas increases, the volume also increases, assuming no change in pressure. This relationship is fundamental in understanding gas behavior, especially in various applications, including diving and other scenarios where gases are involved under different temperatures and pressures. The acknowledgment of both Charles and Gay-Lussac in this context underscores their contributions to the understanding of gas laws, reinforcing that temperature and volume are intrinsically linked when pressure is constant.