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________ is the heat content in a system per unit mass.

a) Specific heat
b) Enthalpy
c) Entropy
d) Latent heat

Answer: b
Explanation: Enthalpy is the heat content in a system per unit mass. Its unit is J/kg in the SI system. It is a thermodynamic property that is governed by the state of the system and it is expressed as H=U+PV, where H is the enthalpy, U is internal energy, and P is pressure and V is volume.

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