Question

Gas constant R=8.314(J/(k*mol))=0.082(l*mol/(k*mol))=1.985(cal/(k*mol)) atomic mass of C=12.01 and H=1.008

Calculate F-H x parameter of PS/cyclohexane at 34C by using solubility parameters. Solubility parameters of PS and cyclohexane at 34C is 9.1 (cal/cm^3)^(1/2) and 8.2 (cal/cm^30^(1/2) respectively. density of cyclohexane is 0.7785(g/cm^3)

The experimental result of above system x is 0.5 at 34 C. Explain the difference between the F-H X and the experiemntally measured x value