How does latent heat differ from sensible heat?

Latent heat is the amount of heat absorbed or released by a substance during a phase change that occurs without a temperature change. This means that even as heat energy is added or removed from a substance, its temperature remains constant while it transitions from one state to another—such as from solid to liquid (melting) or from liquid to gas (vaporization). In these instances, latent heat is responsible for the changes in structure rather than temperature.

In contrast, sensible heat is the heat that causes a temperature change in a substance without a phase change. This type of heat can be directly measured with a thermometer, as it reflects changes in temperature.

Understanding this distinction is crucial because it highlights how energy transfer occurs in different contexts, particularly in HVAC applications. When designing systems for heating or cooling, knowing how to manipulate both latent and sensible heat allows for more efficient temperature management and moisture control in the environment.