Question

1. Pentane (C5H12) and hexane (C6H14) form an ideal solution. At 25oC the vapor pressures of pentane and hexane are 511 and 150 torr, respectively. A solution is prepared by mixing 25 mL pentane (density, 0.63 g/mL) with 36 mL hexane (density, 0.66 g/mL). What is the vapor pressure of the resulting solution? Ptotal = ___ torr 2. Pentane (C5H12) and hexane (C6H14) form an ideal solution. At 25oC the vapor pressures of pentane and hexane are 511 and 150 torr, respectively. A solution is prepared by mixing 25 mL pentane (density, 0.63 g/mL) with 36 mL hexane (density, 0.66 g/mL). What is the composition by mole fraction of pentane in the vapor that is in equilibrium with this solution? X V pen = ___