General Chemistry

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Determining Whether a Reaction is Spontaneous

CHEM-FGYDBA

Which of the following reactions is associated with a DECREASE in entropy?

A

$NH_{4}NO_{3}(s) \rightarrow NH_{4}^{+}(aq) + NO_{3}^{-}(aq)$

B

$CO_{2}(s) \rightarrow CO_{2}(g)$

C

$N_{2}O_{4}(g) \rightarrow 2NO_{2}(g)$

D

$N_{2}(g) + 3H_{2}(g) \rightarrow 2NH_{3}(g)$