The molar volume of liquid benzene density 0 877 g ml increases by a factor of 2750 as it vapourises at 20 C At 27 C when a non

Question

The molar volume of liquid benzene density 0 877 g ml increases by a factor of 2750 as it vapourises at 20 C At 27 C when a non volatile solute that does not dissociate is dissolved in 54 6cm3 of benzene vapour pressure of this solution is found to be 98 88 mm Hg calculate the freezing point of the solution Given Enthalpy of vapourisation of benzene 1 394 57 Jg Enthalpy of fusion of benzene I 10 06 kJ mol Molal depression constant for benzene 5 0 K kg mol 1 177 65 K 2 277 65 K 3 517 65 K 4 237 15 K

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