For the reaction at a certain temperature

CHEMISTRY · Single correct · AP · Chemistry · Equilibrium · Equilibrium

Problem

For the reaction X2(g)⇌2X(g)X_{2}(g)\rightleftharpoons 2X(g) at a certain temperature, the equilibrium constant is K=1.6×10−2K=1.6\times10^{-2}. At one instant the concentrations are [X2]=0.020 M[X_{2}]=0.020\,\text{M} and [X]=0.010 M[X]=0.010\,\text{M}. Which statement best describes how the system will respond? (a) The system is already at equilibrium; no net change will occur. (b) The system will shift left, producing more X2(g)X_{2}(g) until equilibrium is reached. (c) The system will shift right, producing more X(g)X(g) until equilibrium is reached. (d) No prediction can be made because the total pressure is unknown.

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