The energy change accompanying the process below is: Na^+(g)+Cl^-(g) NaCl(s)

JEE Main Chemistry question

The energy change accompanying the process below is:

+→ NaCl(s)

(A)Hydration energy
(B)Ionization energy
(C)Electron affinity
(D)Lattice energyCorrect

Answer: (D)

Solution

This process assembles a solid ionic crystal lattice directly from free gaseous ions, releasing energy as the ions settle into their lowest-energy lattice arrangement. By definition,

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Question ID VK-133678