4. Due to a malfunction of a methanol-fed fuel cell, water and non-reactive methanol are found as waste products. Calculate the bubble point temperature at 101.33 kPa for the methanol (1)/water (2) system in VLE for a liquid mixture containing 30 mol% of methanol. Assume that the vapor phase may be considered ideal and the NRTL equation can be used to model the liquid phase. Answer: 78.46 C