Ncert Exercises & Solutions

Melting point, enthalpy of vaporisation and viscosity data of H₂O and D₂O is given below

	$H_{2} O$	$D_{2} O$
Melting point / K	373.0	374.4
Enthalpy of vaporisation at (373K) kJ $m o l^{- 1}$	40.66	41.61
Viscosity / centipoise	0.8903	1.107

Given that,

	H₂O	D₂O
Melting point/K	373.0	374.4
Enthalpy of vaporization at (373 K)/kJ mol^-1	40.66	41.61
Viscosity/centipoise	0.8903	1.107

From this data, it is concluded that the values of melting point, enthalpy of vaporisation and viscosity depend upon the intermolecular forces of attraction.

Since, their values are higher for D₂O as compared to those of H₂O, therefore, intermolecular forces of attraction are stronger in D₂O than in H₂O.

NEET Information

courses

Company

Botany Questions

Chemistry Questions

Physics Questions

Zoology Questions