State Charles's law. - Leaving Cert Chemistry - Question (i) - 2002

Charles's Law states that the volume of a gas at constant pressure varies directly with its absolute temperature (measured in Kelvin). Mathematically, this can be expressed as:

$V \propto T \quad \rightarrow \quad V = kT$

where:

• $V$ is the volume of the gas,
• $T$ is the absolute temperature in Kelvin,
• $k$ is a proportionality constant.

This indicates that when the temperature increases, the volume also increases, provided the pressure remains constant.