Heat

Heat is the transfer of energy from a hot object to a colder object. There are two types of heat: sensible and latent heat, and three types of heat transfer: convection, conduction, and radiation.

Heat types

Sensible heat is when heat is applied to a substance merely raises its temperature, but does not cause a phase change. It is the heat, which added or subtracted from a substance, that produces a change in temperature that is indicated on a thermometer. It is the heat that you feel or sense.

Latent heat is the heat released or absorbed by a substance when it changes its physical state to another without changing its temperature. Latent heat of fusion is the process of converting from a liquid to a solid or a solid to a liquid and latent heat of vaporization is the conversion of a liquid to a vapor or vapor to a liquid. The latent heat of vaporization phenomenon is the founding principle in refrigeration and air conditioning and is known as the cooling effect. There is also latent heat of sublimation, but is less applicable.

Heat transfer types

Convection is the heat of a fluid substance, such as air or liquid, that then travels away from its heat source and carries its thermal energy along.

Conduction is the transfer of heave via direct molecular collision.

Radiation is the transfer of heat through electromagnetic waves.