For the equilibrium COCl _2(g) CO (g)+ Cl _2(g) the equilibrium constant is 2.5 at…
CHEMISTRY · Single correct · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)
Problem
For the equilibrium
COCl2(g)⇌CO(g)+Cl2(g)
the equilibrium constant Kp is 2.5 at 300 K and 7.8 at 350 K.
A mixture that is at equilibrium at 300 K is rapidly heated to 350 K in a rigid container before any composition change occurs. Which of the following statements correctly describes the net reaction that occurs as the system re-establishes equilibrium at 350 K?
(a) Products are converted to reactants, and the process absorbs heat from the surroundings.
(b) Reactants are converted to products, and the process absorbs heat from the surroundings.
(c) Reactants are converted to products, and the process releases heat to the surroundings.
(d) Reactants are converted to products, and the process does not involve any heat exchange with the surroundings.