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General Chemistry

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Spontaneity of a Chemical Reaction

CHEM-PRNKIR

Nitrogen dioxide dimerizes to form dinitrogen tetroxide according to the following reaction:

$$2N{ O }_{ 2 }(g)\space \leftrightarrow \space { N }_{ 2 }{ O }_{ 4 }(g)\space $$

For this reaction $\Delta H$ = -57.20 kJ/mole and $\Delta S$ = -175.72 J/K.

This reaction is spontaneous ________________.

A

always.

B

never.

C

at high temperatures.

D

at low temperatures.