Gaseous hydrogen iodide is placed in a closed container at , where it partially

Chapter 20, Problem 15.34

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Gaseous hydrogen iodide is placed in a closed container at \(425^{\circ} \mathrm{C}\), where it partially decomposes to hydrogen and iodine: \(2 \mathrm{HI}(g) \rightleftharpoons \mathrm{H}_{2}(g)+\mathrm{I}_{2}(g)\). At equilibrium it is found that \([\mathrm{HI}]=3.53 \times 10^{-3} M,\left[\mathrm{H}_{2}\right]=4.79 \times 10^{-4} M\), and \(\left[\mathrm{I}_{2}\right]=4.79 \times 10^{-4} \mathrm{M}\). What is the value of\(K_{c}\) at this temperature?

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