Mustaqil ish mavzu : What is energy? Types of energy Bajardi: 411-guruh talabasi Xolmatov Nurmuhammad jizzax-2021 yil Plan

C hemical Energy

Chemical energy is the stored energy in the bonds of chemical compounds such as molecules and atoms. The energy is freed in a chemical reaction, most of the time producing heat as by-product. This process is called exothermic reaction. Petroleum, coal, gas, biomass, and batteries are examples of stored chemical energy. Ordinarily, when chemical energy is freed from a substance, it is changed into a totally new substance.

For instance, when an atomic bomb explodes, the stored chemical energy is freed into the environment as kinetic energy, sound energy, and thermal energy. Food is a prime example of chemical energy as the stored energy is released and broken down during digestion. During the breakdown of food, thermal energy is released. Dry wood is another example of chemical energy which releases light and thermal energy when burnt and it produces ashes as a by-product.

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