Question

What is internal energy

Answer 1

Internal energy is the sum of potential energy of the system and the system's kinetic energy. The change in internal energy of a reaction is equal to the heat gained or lost (enthalpy change) in a reaction when the reaction is run at constant pressure.

Answer 2

internal energy is a system is the energy contained within the system excluding the kinetic energy of motion of the system as a whole & the potential energy of the system a whole due to external force field.


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