Enthalpy H , of a substance at any point is quantification of energy , which could be given
by summation of internal energy and flow energy. Enthalpy is very useful thermodynamic property for
the analysis of engineering systems.
Mathematically, it is given as,
U + PV=H
On unit mass basis, the specific enthalpy could be given as,
h = u + pv
Entropy is an extensive property and has units J/K. Specific entropy may be given on unit mass basis(s=S/m (J/KgK