1. (25 points) You have an equation of state which models your pure XX material very well ( in terms of one constant, a. Make sure you state and justify any assumptions you use. PV = RT + aPT 4 a. (15 points) What is the fugacity of XX at 100 C and 50 bar in terms of the constant a? Note that the saturation pressure of XX at 100 C is 40 bar. b. (10 points) If XX and YY form an ideal solution together, what is the fugacity (in terms of the constant a) of XX in a vapor phase mixture of 25 mole % XX and 75 mole % YY at 20 bar and 100 C