This fourth article in the series provides the energy functions for a mixture containing 91. 84 mol% H//2S and 8. 16 mol% toluene. The series so far has presented results derived from data collected on practically important systems containing H//2 S as a major component. Energy, enthalpy, entropy, Helmholtz energy and Gibbs energy for a mixture containing 91. 84 mol% H//2S and 8. 16 mol% toluene are presented for data ranges of 300 less than equivalent to degree K less than equivalent to 500 (80 less than equivalent to degree F less than equivalent to 440) and less than equivalent to MPa less than equivalent to 65 (0 less than equivalent to psia less than equivalent to 9,750).
