AP Chemistry
7.5 Magnitude of the Equilibrium Constant
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.
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?
| Reaction | Equation | Equilibrium 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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