According to the First Law of Thermodynamics, heat is a type of energy. As a result, the concept of energy conservation applies to thermodynamic processes. This method does not allow for the creation or destruction of heat energy. It may, however, be transferred from one location to another and transformed into various forms of energy.Limitation:When a system goes through a thermodynamic process, it must always keep an exact energy balance, because that's what the law says. The first law, on the other hand, fails to take into account the system's process of change of state feasibility.