When the law of conservation of energy is applied to heat it is known as the law of thermodynamics?

The law of conservation of energy, when applied to heat, is encapsulated in the laws of thermodynamics, particularly the first law. This law states that energy cannot be created or destroyed, only transformed from one form to another, including heat energy. It emphasizes that the total energy of an isolated system remains constant, even as heat is transferred between systems or converted into work. Thus, thermodynamics provides a framework for understanding energy interactions involving heat.