The equilibrium constant for is 4.3 at 450 K and 0.92 at 650 K

CHEMISTRY · Subjective · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)

Problem

The equilibrium constant for CO(g)+Cl2(g)⇌COCl2(g)\mathrm{CO(g) + Cl_2(g) \rightleftharpoons COCl_2(g)} is 4.3 at 450 K and 0.92 at 650 K. Determine the sign (positive or negative) of ΔH\Delta H for the reaction.

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