Types of potential energy . (1)

Types of Potential energy :

Chemical energy :Chemical Energy is energy stored in the bonds of chemical compounds (atoms and molecules). It is released in a chemical reaction, often producing heat as a by product (exothermic reaction). Batteries, biomass, petroleum, natural gas, and coal are examples of stored chemical energy. Usually, once chemical energy is released from a substance, that substance is transformed into an entirely new substance.

Gravitional energy :It is important to know the difference between Potential energy and Gravitational energy. 
Every object may have Potential energy but Gravitational energy is only stored in the height of the object. Any time that a heavy object is kept high up, a force or power is likely to be holding it up there. This is the reason why it stays up and does not fall. It is important to note that the heavier the object, the more its potential energy.

Definition of energy.

Measure of the ability of a body or system to do work or produce a change, expressed usually in joules or kilowatt hours.No activity is possible without energy and its total amount in the universe is fixed. In others words , it cannot be created or destroyed but can only be changed from one type to another. The two basic types of energy are(1) Potential : energy associated with the nature , position , or state (such as chemical energy , electrical energy nuclear energy. ).(2)Kinetic : energy associated with motion (such as a moving car or a spinning wheel).