Calculate the vapour pressure of solution having `3.42 g` of cane-sugar in `180 g` water at `40^(circ)C` and `100^(circ)C`. Given that boiling point of water is `100^(circ)C` and heat of vaporisation is `10 kcal mol^(-1)` in the given temperature range. Also calculate the lowering in vapour pressure of `0.2` molal cane-sugar at `40^(circ)C`.

Answer

`759.2 mm`, `0.21 mm`;