If lattice enthalpy and hydration enthalpy of KCl are 699 kJ mol^ -1 and -681.8 kJ mol^ -1 respectively. What is the enthalpy of solution of KCl?

MHT CET 2023 Chemistry question

If lattice enthalpy and hydration enthalpy of KCl are 699 kJ mol and -681.8 kJ mol respectively. What is the enthalpy of solution of KCl?

(A)8.20 kJ mol
(B)10.25 kJ mol
(C)13.80 kJ mol
(D)17.20 kJ molCorrect

Answer: (D)

Solution

Dissolution of an ionic solid is imagined in two steps: the lattice is broken into gaseous ions (needs the lattice enthalpy, kJ mol) and the gaseous ions are hydrated (releases the hydration

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Question ID VK-097443