Question

Heat is called the internal energy of a substance. Explain.

Answer 1

Answer:

It is because the internal energy of a thermodynamic system is the energy contained within it. It is the energy necessary to create or prepare the system in any given internal state. The thermodynamic processes that define the internal energy are transfers of chemical substances or of energy as heat, and thermodynamic work.

Answer 2

Answer:

the process by which green plants turn carbon dioxide and water into food using energy from sunlight

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