Correct Answer: Option A

Explanation

Both lattice energy and hydration energy are involved in heat of solution.

• Lattice energy: The energy required to break an ionic solid into gaseous ions. 

• Hydration energy:The energy released when ions are separated from a lattice and dissolved in water. Hydration enthalpies are always negative.

• Heat of solution:The heat released when a compound is dissolved. The heat of solution can be calculated by adding the lattice energy and hydration energy: 

•                   Heat of solution = Lattice energy + Hydration energy

There is an explanation video available below.

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