At , the reaction has . A mixture in a container at this temperature consists of 6 CO…
CHEMISTRY · Subjective · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)
Problem
At 500K, the reaction CO(g)+Cl2(g)⇌COCl2(g) has Kc=0.56. A mixture in a 1.0L container at this temperature consists of 6 CO molecules, 6 Cl2 molecules, and 12 COCl2 molecules.
The temperature is then increased so that Kc becomes 0.25, while the amounts of each species are momentarily unchanged.
Based on a comparison of Qc with the new Kc, predict whether the net reaction will shift toward the reactants or toward the products as equilibrium is re-established. Support your answer with appropriate reasoning.