`Delta_(vap)S` of acetone is `90.0 J K^(-1) mol^(-1)`. If boiling point of acetone is `50^(@)C`, calculate the heat required for the vaporisation of `1g` of acetone..

Delta_(vap) S1 of acetone is 93.0 JK^(-1) "mol"^(-1) .If boiling point of acetone is 56^(@)C , calculate the heat required for the vaporisation of 1 g of acetone.

Calculate the amount of heat required to vaporise 1g of ice initially at 0^@C .

The enthalpy of vaporisation of a substance is 8400 J mol^(-1) and its boiling point is -173^(@)C . The entropy change for vaporisation is :

Boiling point of ethanol is 78.4 ^(@) C . Change in enthalpy during vaporisation of ethanol is 96 J * mol^(-1) . Calculate the change in entropy of vaporisation of ethanol .

0.70 g of an organic compund when dissolved in 32g of acetone produces in an elevation in boiling point of 0.25^(@)C . Calculate the molecular mass of the organic compound. (K_(b)" for acetone "=1.72 K kg mol^(-1)) .

A solute containing 0.564g of solute in 36.8g of acetone boils at 56.46^(@)C . Calculate the molar mass of solute if the boiling point of acetone is 56.30^(@)C . [ K_(b) for acetone 1.92K kg. mol^(-1) ]

Acetone boils at 56.38^(@) C and a solution of 1.41 g of an organic compound in 20 g of acetone boils at 56.88^(@) C. Calculate the molar mass of the organic compound (Given k_(b) for acetone = 1.67 k kg/ mol).

A solution containing 7g of a solute (molar mass 210 "g mol"^(-1) ) in 350g of acetone raised the boiling point of acetone from 56^(@)C to 56.3^(@)C . The value of ebullioscope contant of acetone in "K kg bol"^(-1) is :