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Which of the following is a conversion from chemical energy to thermal energy?

A. Coal is burned to boil water.
B. Food is digested and used to regulate body temperature.
C. Charcoal is burned in a barbeque pit.
D. All of the above

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thatschoolchick
The answer would be D. All of the above. 
This is known as a exothermic reaction. 
Chemical energy may be released during a chemical reaction, often in the form of heat. Thermal energy is the internal energy of an object due to the kinetic energy of its atoms and/or molecules.

The correct answer is D. All of the given options are correct.

Chemical Energy is the energy stored in the chemical bonds whereas Thermal Energy is contained in the translational and vibrational motion of molecules.

In the transformation of Chemical Energy to Thermal Energy, the chemical bonds break down and the energy stored in these bonds is used in increasing the velocity of the molecules of the substance. And the increase in velocity of the molecules results in an increase in the kinetic energy of molecules, thus increasing the thermal energy.

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