JEE Mains · Chemistry · STD 11 - 5. Thermodynamics and thermochemistry
If the enthalpy of sublimation of Li is \(155~kJ~mol ^{-1}\), enthalpy of dissociation of \(F_2\) is \(150~kJ~mol ^{-1}\), ionization enthalpy of Li is \(520~kJ~mol ^{-1}\), electron gain enthalpy of F is \(-313~kJ~mol ^{-1}\), standard enthalpy of formation of LiF is \(-594 kJ mol ^{-1}\). The magnitude of lattice enthalpy of LiF is _______ \(kJ~mol ^{-1}\) (Nearest integer).
- A 1000
- B 1031
- C 1150
- D 950
Answer & Solution
Correct Answer
(B) 1031
Step-by-step Solution
Detailed explanation
\(-594=155+520+\frac{150}{2}-313+(\) L.E. \()\) L.E. \(=-1031 kJ / mol\)
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