?Gaseous hydrogen iodide is placed in a closed container at \(425^{\circ} \mathrm{C}\)

Chapter 15, Problem 15.32

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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 \([\mathrm{HI}]=3.53 \times 10^{-3} \mathrm{M},\left[\mathrm{H}_{2}\right]=4.79 \times 10^{-4} \mathrm{M}\), and \(\left[I_{2}\right]=4.79 \times 10^{-4} M\). What is the value of \(K_{c}\) at this temperature?

Text Transcription:

425^{\circ} C

2 HI(g) \rightleftharpoons H2(g) + I2(g)

 [HI] = 3.53 X 10-3 M, [H2] = 4.79 X 10-4 M

[I2] = 4.79 X 10-4 M