question_answer 1)

  Melting point, enthalpy of vaporisation and viscosity data of \[{{H}_{2}}{{O}_{2}}\] and \[{{D}_{2}}{{O}_{2}}\] are given below :  

	\[{{H}_{2}}O\]	\[{{D}_{2}}O\]
Melting point	373.0	374.4
Enthalpy of vaporization at\[(373K)/kJmo{{l}^{-1}}\]	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:

  Intermolecular forces are stronger in heavy water on account of high mass.