Question

The heat content of a system is equal to the enthalpy only for a system that is at constant what?

Answer 1

Answer:

The heat content of a system is equal to the enthalpy for a system that is at a constant pressure.

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Explanation:

The heat content of a system is the thermodynamic measurement of a system which is equal to the internal energy plus the product of the volume and the pressure of the system.

The enthalpy of a system is the amount of energy in that system that has the potential to achieve mechanical work.

These two forms of thermodynamic energy can only be equal for the system if the pressure of that system is maintained at a contant.