Burning coal demonstrates the first law of thermodynamics.

Name: Burning coal demonstrates the first law of thermodynamics.
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The first law of thermodynamics, also known as the law of conservation of energy, states that energy cannot be created or destroyed, only converted from one form to another. When coal burns, the stored energy in the coal is converted into heat and light energy, in accordance with the first law of thermodynamics.

Burning Coal Demonstrates the First Law of Thermodynamics