Lye soap is a cleaning product that is made using lard, water, and lye. It was historically used around the world before commercially produced soaps became commonly available, and is still used by many people because of its potential benefits for skin and because of its all-natural recipe.
Definition of Heat Transfer. Heat transfer, also referred to simply as heat, is the movement of thermal energy from one thing to another thing of different temperature.
Heat transfer always occurs from a region of high temperature to another region of lower temperature. Heat transfer changes the internal energy of both systems involved according to the First Law of Thermodynamics.