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Question
Which one of the following has ΔS0 greater than zero?
Options
\[\ce{CaO_{(s)} + CO2_{(g)} ⇌ CaCO3_{(s)}}\]
\[\ce{NaCl_{(aq)} ⇌ NaCl_{(s)}}\]
\[\ce{NaNO3_{(s)} ⇌ Na^+_{( aq)} + NO^-_{3(aq)}}\]
\[\ce{N2_{(g)} + 3H2_{(g)} ⇌ 2NH3_{(g)}}\]
MCQ
Solution
\[\ce{NaNO3_{(s)} ⇌ Na^+_{( aq)} + NO^-_{3(aq)}}\]
Explanation:
NaNO3 is a solid that is broken down into liquid ions. As a result, for this reaction, ΔS0 is greater than zero.
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Spontaneous (Irreversible) Process
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