Which one of the following has ΔS⁰ greater then zero

Options

(a) CaO(s)+ CO₂(g) ⇌ CaCO₃(s)
(b) NaCl(aq) ⇌ NaCl(s)
(c) NaNO₃(s) ⇌ Na⁺(aq) + NO₃⁻(aq)
(d) N₂(g) + 3H₂(g) ⇌ 2NH₃(g)

Correct Answer:

NaNO₃(s) ⇌ Na⁺(aq) + NO₃⁻(aq)

Explanation:

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