NaCl crystals require energy ( called lattice energy ) to break into ions. Then why NaCl is soluble in water ?

Explanation

To understand why NaCl is soluble in water despite the requirement of lattice energy to break it into ions, we can analyze the dissolution process step by step.

### Step-by-Step Solution:

1. **Understanding Lattice Energy**:
- Lattice energy is the energy required to separate one mole of a solid ionic compound into its gaseous ions. For NaCl, this means breaking the NaCl crystal into Na⁺(g) and Cl⁻(g) ions.
- This process requires energy input, which is why we refer to it as an endothermic process.

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