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General Chemistry

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Moderate

Spontaneity and Temperature

CHEM-JS8RBF

For the following reaction $NH_{4}NO_{3}(s) \leftrightarrow NH_{4}^{+}(aq) + NO_{3}^{-}(aq)$, $\Delta H=28.05 kj/mol$ and $\Delta S=108.7 J/mol K$.

At what temperatures is this reaction spontaneous?

A

All temperatures.

B

$T>3.8 K $

C

$T>258K$

D

$T<258 K$