Question

Melting point, enthalpy of vapourisation and viscosity data of `H_(2)O` and `D_(2)O` is given below:
`{:(,H_(2)O,D_(2)O),("Melting point/k",373.0,374.4),("Enthalpy of vapourisation at (373K)/KJ mol"^(-1),40.66,41.61),("Viscosity/centipoise",0.8903,1.107):}`
On the basis of this data explain in which of these liquids intermolecular forces are stronger?

Answer 1

The melting point, enthalpy of vaporization and viscosity values of all these items depend upon the intermolecular foreces of attraction . Since their values are highter for `D_(2)O` as compared to those of `H_(2)O`, therefore, intermolecular forces of attraction are stronger in `D_(2)O` than in `H_(2)O`.