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CO + 3H2 ⇌ CH4 + H2O is compressed to half volume. What follows for Qc and direction?
AQc < Kc, forward
BQc > Kc, forward
CQc = Kc, none
DQc > Kc, reverse
Answer & Solution
Correct answer: A. Qc < Kc, forward
Doubling all concentrations makes Qc one quarter of Kc (factor 2^2/2^4), so net reaction goes forward.
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