Law of Conservation of Energy:
Energy can never be created and neither be destroyed and it only changes its form from one entity to another. In an isolated system, the total energy remains the same or is conserved over time. In any closed system, the mass does not change and remains within the boundary except energy in the form of heat can cross the boundary and; The law of conservation clearly defines that energy could never be created or destroyed except can be conveniently transferred to another form without changing the overall quantity within a system. Chemical energy could be converted into heat energy and in turn, could be utilized to develop potential energy form in yet another body. The potential energy thus formed can be used for running an engine or an object which is literally the kinetic part of the same energy. Energy may change from one form to another and does so without a net loss or net gain. Hence, energy is conserved and the total amount remains constant. Although energy may be changed from one form to another it’s not altogether lost from the system and is conserved. A system is thus something enclosed within boundaries which may be either for real or imaginary and isolated system leads us to believe that nothing from outside affects the system and vice versa The universe is supposed to be the largest system which helps in understanding this principle better and this law can be defined in terms of the closed system, open system or even isolated system as we will. Bottom line, the total energy of an isolated system remains constant.