Internal Energy

Definition

Internal energy refers to the total amount of kinetic and potential energies possessed by all particles within a substance.

Related terms

Temperature: A measure of how hot or cold an object is, which is related to the average kinetic energy of its particles.

Heat Transfer: The process by which thermal energy moves from one object or substance to another.

Thermal Equilibrium: When two objects are at the same temperature and there is no net transfer of heat between them.