### A key step in the metabolism of glucose for energ…

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Problem 103

The molecular scene depicts a gaseous equilibrium mixture at $460^{\circ} \mathrm{C}$ for the reaction of $\mathrm{H}_{2}(\text {blue})$ and $\mathrm{I}_{2}$ (purple) to form HI. Each molecule represents 0.010 mol and the container volume is 1.0 $\mathrm{L}$ . (a) Is $K_{\mathrm{c}}>,=,$ or $<1 ?$ (b) Is $K_{\mathrm{p}}>=,$ or $<K_{\mathrm{c}} ?(\mathrm{c})$ Calculate $\Delta G_{\mathrm{rxn}}^{\circ}$ . (d) How would the value of $\Delta G_{\mathrm{rxn}}^{\circ}$ change if the purple molecules represented $\mathrm{H}_{2}$ and the blue $\mathrm{I}_{2} ?$ Explain.

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Chapter 20
Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions
CHEMISTRY: The Molecular Nature of Matter and Change 2016

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