Which gas law states that the volume of a gas is directly proportional to its temperature at a constant pressure?

The law that explains the relationship between the volume of a gas and its temperature at constant pressure is Charles's Law. This fundamental principle of gas behavior states that when the temperature of a gas is increased, the volume also increases, provided the pressure remains constant. Essentially, this law highlights the direct proportionality: as the temperature rises, the gas molecules move more vigorously, causing them to occupy more space, thus expanding the volume.

Charles's Law is particularly important in various applications in aviation where temperature fluctuations can impact gas behavior, such as inside aircraft cabins, fuel calculations, and other systems that rely on gas expansion. Understanding this relationship is crucial for ensuring safe and efficient operations in aviation settings.