When 1.00 g of pure benzoic acid C7H6O2 is added in 50.0 grams of carbon tetrachloride CCl4, the freezing point of the solution =4.9 degree Celsius lower than the normal freezing point of pure solvent (-22.3oC) then compute the molecular weight of benzoic acid C7H6O2 in carbon tetrachloride.?
Estimate the change in entropy if fifty kilo joules of energy are transferred reversibly and isothermally as heat to a large block of Cu at zero degree Celsius and seventy degree Celsius?