a Define the relationship between the excess properties and the property changes of mixing for V, H, S&G. b. The partial molar enthalpy of mixing of benzene (1) and cyclohexane (2) is: , = 3,600x, , = 3,600x, Determine the excess enthalpy for both species if 3 moles of benzene is mixed with 4.5 moles of cyclohexane. QUESTION 3 (5 Marks) 1 Consider a binary liquid mixture at constant T and P of the enthalpy change of mixing is AH = 5xzxz and the entropy change of mixing AS = -R(x, Inx; + x2Inxz). Determine the gibbs free energy of change of mixing and excess gibbs energy at 460K