Problem 3 (10%) (a) (8) A vessel, divided into two parts by a partition, contains 4 mol of A gas at 350K and 30 bar on one side and 3 mol of B gas at 350K and 20 bar on the other. If the partition is removed and the gases mix completely to form a gas mixture also at 350K, what are the changes in enthalpy, entropy and Gibbs free energy? Assume both A and B gases are ideal gases with C_v = 2.5R. R = (b) (2) The enthalpy of a C-D binary system at fixed T and P is represented by the equation: H = 600x_c +  400x_D+x_cx_D(40x_c+20x_D). Is this binary system an ideal solution? Why or why not?