Liquid propanol (C3H7OH) has a normal boiling point of 97.2C and liquid butanol (C4H9OH) has a normal boiling point of 118C. (a) In which of the two are the intermolecular forces the weakest? (b) Which of the two would you expect to have the lowest viscosity at 25C ? At 25C, the viscosity of liquid pentanol (C5H11OH) is 3.62mPas and the viscosity of liquid ethanol (C2H5OH) is 1.07mPa. (a) Which of the two would you expect to have the higher normal boiling point? (b) Which of the two would you expect to have the lower surface tension at 25C