- #1
Ali Durrani
- 56
- 5
Right i have two questions,
Is enthalpy term associated with a non flow process? because what i have understood so far is that Enthalpy actually is the internal energy plus the flow work, and in a non flow process there literally is no flow so how can enthalpy be there? because in U+PV, PV is not defined.
secondly, i would really like to understand heat capacities at constant pressure and constant volume (Cp, Cv) because they are sometimes not used in their respective processes, for instance pump work is a function of enthalpy change of the water and the mass flow rate, and enthalpy is a function of heat capacity at constant pressure but pumping up water is not at all a constant pressure process
Is enthalpy term associated with a non flow process? because what i have understood so far is that Enthalpy actually is the internal energy plus the flow work, and in a non flow process there literally is no flow so how can enthalpy be there? because in U+PV, PV is not defined.
secondly, i would really like to understand heat capacities at constant pressure and constant volume (Cp, Cv) because they are sometimes not used in their respective processes, for instance pump work is a function of enthalpy change of the water and the mass flow rate, and enthalpy is a function of heat capacity at constant pressure but pumping up water is not at all a constant pressure process