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AP Chemistry
7.5 Magnitude of the Equilibrium Constant
IntermediateMCQMathematicalConceptual25.4k
Three separate rigid \(1.0\text{ L}\) vessels at \(298\text{ K}\) initially contain \(1.0\text{ mol}\) of \(\text{AB}(g)\), \(\text{CD}(g)\), and \(\text{EF}(g)\), respectively. The three gases decompose according to the reactions and equilibrium constants shown in the table below.

ReactionEquationEquilibrium Constant, \(K_c\)
I\(\text{AB}(g) \rightleftharpoons \text{A}(g) + \text{B}(g)\)\(4.0 \times 10^{-12}\)
II\(\text{CD}(g) \rightleftharpoons \text{C}(g) + \text{D}(g)\)\(1.5 \times 10^{-2}\)
III\(\text{EF}(g) \rightleftharpoons \text{E}(g) + \text{F}(g)\)\(8.0 \times 10^{6}\)

Which of the following correctly ranks the reactions in order of the percent of initial reactant converted to products once equilibrium is established, from greatest to least?

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