question_answer

In solid\[N{{H}_{3}}\], each \[N{{H}_{3}}\] molecule had 6 other \[N{{H}_{3}}\] molecules as nearest neighbours. \[\Delta H\] of sublimation of \[N{{H}_{3}}\] at the melting point is 30.8 kJ/mole and the estimated AH of sublimation in the absence of hydrogen bonding is 14.4 kJ/mole. the strength of H-bond in solid \[N{{H}_{3}}\] is

A)  \[5.5 kJ mo{{l}^{-}}^{1}\]                

B)  \[16.4 kJ mo{{l}^{-}}^{1}\]

C)  \[2.7 kJ mo{{l}^{-}}^{1}\]                

D)  \[-8.7 kJ mo{{l}^{-}}^{1}\]