A sealed vessel contains an equilibrium mixture for the exothermic reaction N _2(g)+3…
CHEMISTRY · Single correct · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)
Problem
A sealed vessel contains an equilibrium mixture for the exothermic reaction
N2(g)+3H2(g)⇌2NH3(g)
Which change is most likely to increase the equilibrium mole fraction of NH3 in the mixture?
(a) Adding an inert gas at constant volume, thereby increasing the total pressure.
(b) Introducing a catalyst while holding temperature and pressure constant.
(c) Decreasing the temperature while compressing the gas to raise the total pressure.
(d) Increasing the temperature while simultaneously compressing the gas to raise the total pressure.