need help solving please

Part 3: Open answer questions (6 and 4 points, 10 points total) 1. (6 points) It can be shown that the residual Gibbs energy can be related to residual volume by the equation: VR RT SP Describe an experiment through which it is possible to obtain an estimate of the fugacity coefficient of a non-ideal gas which conditions will you vary? Which will you keep constant? What will you measure? How is that information related to fugacity coefficient? 2. (4 points) Using your own words, answer: a. what is the state principle and why is it important in Chemical Engineering? b. What is heat capacity? Page 5 of 7