College Chemistry Quiz
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A chemical engineering student is studying the water-gas shift reaction: CO(g)+H2O(g)⇌CO2(g)+H2(g)CO(g) + H_2O(g) \rightleftharpoons CO_2(g) + H_2(g) at 1000 K, where Kc=1.0K_c = 1.0. Three different experimental trials are conducted in identical 2.0 L reactors, each starting with different initial conditions but reaching equilibrium at the same temperature.
In Trial 1, the reactor initially contains 0.40 mol COCO and 0.40 mol H2OH_2O with no products. After reaching equilibrium, the concentration of COCO is measured to be 0.10 M. What is the reaction quotient QcQ_c if, at some intermediate time before equilibrium, the concentrations are [CO]=0.15 M[CO] = 0.15 \text{ M}, [H2O]=0.15 M[H_2O] = 0.15 \text{ M}, [CO2]=0.05 M[CO_2] = 0.05 \text{ M}, and [H2]=0.05 M[H_2] = 0.05 \text{ M}?
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