Question

Why is dissolving naoh in water is an exothermic

Answer 1

Explanation:

NaOH+H2O=Na+ and OH-ions this reaction will be exothermic when heat will be released the heat evolved as a result of mixing solid sodium with water is due to the -OH ions incredible stability.

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Answer 2

Answer:

Whether dissolution is endothermic or exothermic will depend on the lattice energy of the salt and the hydration energy when water surrounds the ions. ... That is, for NaOH, it takes more energy to break the lattice apart than what is generated by the water surrounding the ions. The ∆E is negative, and this is exothermic.