Define and explain the term internal energy.

1.	Define and explain the term internal energy.
Answer» Internal energy : It is defined as the total energy constituting potential energy and kinetic energy of the molecules present in the system. Explanation : The internal energy of a system is a state function and thermodynamic function. It is denoted by U. Its value depends on the state of a system. The change in internal energy (ΔU) depends only on the initial state and the final state of the system. Δ U = U – U It is an extensive property of the system. It has same unit as heat and work. Total internal energy U of the system is, Total energy = Potential energy + Kinetic energy

Answer»

Internal energy : It is defined as the total energy constituting potential energy and kinetic energy of the molecules present in the system.

Explanation :

The internal energy of a system is a state function and thermodynamic function. It is denoted by U.
Its value depends on the state of a system.
The change in internal energy (ΔU) depends only on the initial state and the final state of the system. Δ U = U – U
It is an extensive property of the system.
It has same unit as heat and work.
Total internal energy U of the system is, Total energy = Potential energy + Kinetic energy

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Define and explain the term internal energy.

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