Propane undergoes a change of state from state- 1(6 bar and 100C) to state-2 (12 bar and 500C ). The heat capacity (cP) of propane is given as 74.29J/mol.K. (i) Determine the residual enthalpies (H1R and H2R) for propane at state 1 and state 2. [16 marks] (ii) Calculate the enthalpy change of propane using the residual enthalpy values. [6 marks] Question 4: (a) Determine the phase compositions for the methyl acetate (1) - cyclohexane (2) binary system at 64C and 68kPa, assuming Raoult's law is applicable. [ 8 marks] (b) The following gas phase reaction CO(g)+2H2(g)CH3OH(g) was conducted at 327C and 300atm with the mole ratio, 1molCO:3molH2. The fugacity coefficients are given as CO=0.90;H2=1.20 and CH3OH=0.47, respectively. The reaction equilibrium constant is given as 0.91104. The mixture behaves like an ideal solution. Estimate the reaction ordinate (). Standard pressure is assumed as 1atm. [14 marks]