If `DeltaH_("vaporisation")` of substance X (l) (molar mass :30 g/mol) is 300 J/g at it's boiling piont 300K, then
molar entropy change for reversible conddensation process is

If Delta H_("vaporisation") of substance X (l) (molar mass : 30 g//mol ) is 300 J/g at it's boling point 300 K , then molar entropy change for reversible condensation process is

If Delta H_("vaporisation") of (C_(2)H_(5))O(l) is 350 J//g at it's boiling point 300 K, then molar entropy change for condensation process is

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 :

A substance has latent heat of vaporisation (at its boiling point 300K) = 3kJ//g . If molar mass of substance is 40, the molar entropy change for condensation process will be:

4.5g mass of a substance (molar mass = 90g/mol) is dissolved in 250ml solution, the molarity of solution is

The entropy of vaporization of a liquid is 58 J K^(-1) mol^(-1) .If 100 g of its vapour condenses at its boiling point of 123^(@)C , the value of entropy change for the process is (molar mass of the liquid = 58 mol^(-1) ).

If 1 g of solute (molar mass = 50 g mol^(-1) ) is dissolved in 50 g of solvent and the elevation in boiling point is 1 K. The molar boiling constant of the solvent is

If 1 g of solute (molar mass = 50 g mol^(-1) ) is dissolved in 50 g of solvent and the elevation in boiling point is 1 K. The molar boiling constant of the solvent is