Which law describes how gases tend to expand when heated?

Charles' Law describes the relationship between the volume of a gas and its temperature, specifically indicating that gases tend to expand when heated. This law states that at constant pressure, the volume of a gas is directly proportional to its absolute temperature (measured in Kelvin). As the temperature of the gas increases, its molecules gain kinetic energy, causing them to move faster and occupy a larger volume, thus resulting in expansion.

This relationship exemplifies how heating a gas leads to an increase in volume, highlighting the fundamental behavior of gases under varying thermal conditions. Understanding Charles' Law is crucial for applications in various scientific fields, such as thermodynamics and meteorology, where the behavior of gases is essential.