2. Consider a mixture of 20 mL tetrahydrofuran (1) and 20 mL hexane (2). Tetrahydrofuran(THF) and hexane follow a two-suffix Margules solution model gE = Ax1x2, where A = 2883J/mol

and is independent of temperature. A. Calculate the activity coefficients of hexane and tetrahydrofuran in the mixture at160 °C. (10 pts). B. The mixture is heated inside a pressure vessel to 160 °C. Calculate the pressure exerted by the mixture. (14 pts) Assume ideal gas phase. C. Calculate the mole fractions of THF and hexane in the gas phase. (6 pts) D. Describe how you would solve parts B and C if the gas phase were not ideal. (5 pts) \begin{array}{l} \text { E. What is the partial molar enthalpy of mixing of hexane }\left(\overline{\Delta H_{m}, 2}\right) \text { in the mixture, if }\\ \Delta h_{\operatorname{mix}}=h^{\mathrm{E}}=\mathrm{g}^{\mathrm{E}}=\mathbf{A x}_{1} \mathrm{x}_{2} ? \text { ? (6 pts) } \end{array} F. (EXTRA CREDIT – 4 pts) Based on the assumption made in (D), is mixing random ornot? Explain.