Question
Chemistry Question on Enthalpy change
The correct order of hydration enthalpies is
(A) K+
(B) Rb+p
(C) Mg2+
(D) Cs+
(E) Ca2+
Choose the correct answer from the options given below:
A
E > C > A > B > D
B
C > E > A > D > B
C
C > A > E > B > D
D
C > E > A > B > D
Answer
C > E > A > B > D
Explanation
Solution
Hydration enthalpy is proportional to charge density
So, The correct order of charge density is
Mg2+ > Ca2+ > K+ > Rb+ > Cs+
Therefore The order of hydration enthalpy
C > E > A > B > D