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5. Which of the following is a source of chemical energy?​

Sagot :

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Answer:

Coal. The most basic source of chemical energy is coal. Coal is formed when excessive heat and pressure under the Earth surface act upon rocks for millions of years. Coal is burned to obtain chemical energy.

Answer: Wood

Wood is an easily available source of chemical energy. Since ancient times, wood has been burnt to give out heat and energy. The wood decomposes to produce chemical energy.

             Coal

The most basic source of chemical energy is coal. Coal is formed when excessive heat and pressure under the Earth surface act upon rocks for millions of years. Coal is burned to obtain chemical energy.

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