A) Calculate the fugacity of liquid hydrogen sulphide in contact with its saturated vapor at 25.5C and 20 bars.
(B) The vapor pressure of pure water at 310.6 K is 6.455 kPa. Compute the fugacity of pure liquid water at 310.6 K when it is under a pressure of 100 bars, 500 bar, and 1000 bar. [Volume 7 of the International Critical Tables (McGraw-Hill, New York, 1929) gives values of 6.925, 9.175, and 12.966 kPa, respectively, for these conditions.]