Calculate the enthalpy and entropy of saturated isobutene

Question

Problem:

Calculate the enthalpy and entropy of saturated isobutene vapor at 360 K from the following information:

1. compressibility-factor data for isobutene vapor.

2. The vapor pressure of isobutane at 360 K is 15.41 bar.

3. H₀^ig = 18,115.0 J mol^-1 and S₀^ig = 295.976 J mol^-1 K^-1 for the ideal gas reference state at 300 K and 1 bar.

4. The ideal-gas heat capacity of interest is:

C_P^ig/R = 1.7765 + 33.037× 10^-3 T (T/K)