Physical Chemistry 1 Quiz
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CHEMICAL EQUILIBRIUM
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Consider the equilibrium H2(g)+I2(g)⇌2HI(g)\text{H}_2(g) + \text{I}_2(g) \rightleftharpoons 2\text{HI}(g) with ΔH∘=+26.5 kJ/mol\Delta H^\circ = +26.5 \text{ kJ/mol} at 731 K where Kp=46.0K_p = 46.0. A chemist observes that when the equilibrium mixture is rapidly compressed to half its volume at constant temperature, the initial rate of the forward reaction increases by a factor of 8, while the reverse reaction rate increases by a factor of 4. Which thermodynamic principle explains the subsequent equilibrium shift?
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