Explain the law of conservation of energy.

The law of conservation of energy is one of the basic laws of physics and therefore governs the microscopic motion of individual atoms in a chemical reaction. The law of conservation energy states:

In a closed system, i.e., a system that isolated from its surroundings, the total energy of the system is conserved.

In SI units, energy has units of Joules. 1 Joule = 1 kgms.

Some forms of energy:

1.Kinetic energy - energy of motion.2.Potential energy - energy of ``location'' with respect to some reference point.3.Chemical energy - energy stored in chemical bonds, which can be released in reactions.4.Electrical energy - energy created by separating charges; energy stored in a battery, for example.5.Thermal energy - energy given off as heat, such as friction.