Kinetic energy and potential energy.
Yes,burning fuel is a useful chemical reaction as energy is released and can be converted into different forms to do useful work
For example thermal energy.
Chemical energy can be "used" (ie changed from one form to another) through a chemical reaction. Energy may be released in many forms, including heat.
Yes, energy can be stored in many forms and released again.
secret
light and heat energy
Primarily thermal energy.
The energy released by fault movement forms seismic waves.
energy is released
Yes and no. Yes before the reaction, No after the reaction.There is potential chemical energy among constituent substances in an exothermic reaction - such as in Hydrogen and Oxygen. When the chemicals combine, the reaction liberates thermal energy that was stored as potential chemical energy before the reaction.During the chemical reaction, the potential energy is converted into thermal (and perhaps other forms, such as light) energy.After the chemical reaction, the thermal energy is disspiated, and the potential energy is gone.
The transition stage is the stage of a reaction where atoms have the highest energy. A covalent bond forms when atoms share electrons.