Decomposition of sodium chloride into a sodium ion and chloride

decomposition-of-sodium-chloride-into-a-sodium-ion-and-chloride

Decomposition of sodium chloride into a sodium ion and chloride ion releases energy of 788 KJ per Mol, what is the energy called?

A. lattice energy

B. translation energy

C. dilution energy

D. neutralization energy

I got this question during an interview for a job.

My query is from Thermodynamics topic in portion Thermodynamics of Chemistry – Class 11

Correct choice is A. lattice energy

Easiest explanation: Lattice enthalpy is the enthalpy change when one molecule of an ionic compound dissociates into its ions and gaseous state. Here sodium chloride is an ionic compound and it decomposes into sodium and chloride ions, so the energy released is lattice energy.