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SAT® Subject Test in Chemistry

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Reversible Reactions

SATCHM-C4JHDG

$$PCl_3(g) + Cl_2(g) \rightleftharpoons PCl_5(g) + \text{energy}$$

When the reaction shown above is at equilibrium, which statement is true?

A

The temperature will be increasing.

B

The temperature will be decreasing.

C

The amount of $PCl_3$ will be increasing.

D

The amount of $PCl_5$ will be increasing.

E

$Cl_2$ will be formed and used at equal rates.