1. From the graph showing the enthalpy of binary gas mixture of species 1 and 2 at fixed temperature and pressure, 1.1 Find the molar enthalpy of pure species 1 and 2, the partial molar enthalpy of species 1 and 2 at XL = 0.2 and the partial molar enthalpy at infinite dilution of species 1 and 2. 1.2 Estimate the enthalpy change of mixing (') when 1 mol of species 1 was mixed with 4 mol of species 2 in the binary gas mixture at the same temperature and pressure. 600 500 400 H (J/mo) 300 200 100 0 0 0.2 0.4 0.6 0.8 1 X1