How does an increase in temperature affect gas?

An increase in temperature affects gas primarily by causing it to expand. This occurs because gas particles move more rapidly as they gain kinetic energy from the heat. As the temperature rises, the energy makes the particles move apart, leading to an increase in volume if the gas is allowed to expand. This behavior is described by Charles' Law, which states that at constant pressure, the volume of a gas is directly proportional to its absolute temperature.

In practical applications, this property of gases is essential in various fields, such as meteorology, engineering, and environmental science. For instance, understanding how gases expand with temperature can help in designing equipment that operates at different temperatures, such as engines and HVAC systems.