law of thermodynamics Definition

conservation of energy —called also first law of thermodynamics

a law in physics: mechanical work can be derived from the heat in a body only when the body is able to communicate with another at a lower temperature or all actual spontaneous processes result in an increase of total entropy —called also second law of thermodynamics

a law in physics: at the absolute zero of temperature the entropy of any pure crystalline substance is zero and its derivative with respect to temperature is zero —called also third law of thermodynamics

a principle in physics: the total energy of an isolated system remains constant irrespective of whatever internal changes may take place with energy disappearing in one form reappearing in another —called also first law of thermodynamics, law of conservation of energy

conservation of energy

law of thermodynamics

law of thermodynamics