Go To Unit III Menu 1. It becomes warmer because the molecules are set into more vigorous vibration which is more kinetic energy. KE is measured by temperature. Heat from your hand transfers to the pipe leaving your hand feeling colder.
Heat always flows from more warm substances to less warm substances.
Distinguish between temperature and heat. Temperature is the measure of the average kinetic energy of a substance, while heat is the energy that flows from a substance of higher temperature to one of lower temperature. Distinguish between heat and internal energy. Heat is the measure of flow of energy. Internal energy is the total of all the potential energy inside the molecules plus the kinetic energy of the molecules.