You wish to determine the fugacity of a in a liquid mixture with 1 mole of a and 4 moles of b at 30 kPa and 20°C. At this temperature, the saturation pressure of pure a is 50 kPa. The excess Gibbs energy for a mixture of a and b has been fi t to the following relation:

Transcribed Image Text:

gE = (0.25x + 0.5x)x a Xb