Question

The energy released on burning coal, oil, wood or gas is:
(A) kinetic energy
(B) heat energy
(C) light energy
(D) solar energy

Answer 1

Hint: When wood, oil, coal, or gas is burned then the energy inside it changes form and is released into the atmosphere. The energy changes its form from the potential energy into the substances to heat energy.

Complete step by step answer:
From the law of conservation of energy we know that energy can neither be created nor be destroyed. It can only change from one form to another. When coil, oil, wood, or gas is burned in the presence of air, the energy stored inside them is released in the atmosphere in the form of heat along with a few other by-products. When wood is burned some changes take place inside it at the molecular level.
Therefore on burning coal, oil wood, or gas heat energy is released and thus the correct answer is option (B).

Additional Information
Heat energy is a necessary form of energy for life to survive on earth. It is also maintained and stored in the atmosphere. Heat energy can be transferred from one object to another. This flow of heat energy takes place due to the difference in the temperature of various substances. Heat energy is transferred in mainly three processes, conduction, convection, and radiation. The heat energy can be divided into two kinds, sensible heat, and latent heat.

Note:
There are a huge number of productive uses of heat energy. It can be used for cooking, drying, smoking, baking, or water heating. In transportations, fuels like gasoline act as a huge source of heat energy. In other places like industries, hospitals, and public utilities, heat energy is used extensively.