Question
Question: Which of the following is the increasing order of enthalpy of vaporization ?...
Which of the following is the increasing order of enthalpy of vaporization ?
A
NH3, PH3 , AsH3
B
AsH3, PH3 , NH3
C
NH3, AsH3 , PH3
D
PH3, AsH3 , NH3
Answer
PH3, AsH3 , NH3
Explanation
Solution
Enthalpy of vaporization is directly proportional to the strength of inter molecular force of attraction like hydrogen bonding vander Waal's force of attraction.
NH3 ¾® H–bonding ,
PH3 and ASH3 ¾® Vander walls bond.