Question

Points will be deducted for incorrect significant figures or incorrect units. Phase changes often cause a large change in entropy and are somewhat unique in that they occur at a constant temperature. Imagine you have 4.23 moles of liquid methanol, at its boiling point 64.7 °C. The molar enthalpy of vaporization for methanol is 35.27 kJ mol? What is the change in entropy of the methanol sample as it is converted to a gas at 64.7 °C?

Answer 1

? Entropy change during these change © BHvap a here 4.23 incles are getting vapourited to o Huap = 4-23X 35.27 1 - fox one mele ! Shup = 199.1 kJ . . { BHvap = 35-28 kJ Top ( Beiling Point) = 64.7°C = 337.7K from ② osses = DS sys = 149.1x10? 1 337.7 Sous = 44.551k