At 298 K the synthesis of ammonia proceeds according to the following three balanced…
CHEMISTRY · Multi-part · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)
Problem
At 298 K the synthesis of ammonia proceeds according to the following three balanced equations, each written with its own label.
(a) Rank the equilibrium constants KA, KB, and KC from largest to smallest. Clearly indicate any that are equal.
(b) For reaction A, predict the sign of ΔG∘ at 298 K and explain your reasoning in terms of the magnitude of KA relative to 1.
(c) If reaction B were carried out in a rigid, closed container starting with pure ammonia at 298 K, would the partial pressure of hydrogen increase, decrease, or remain unchanged as equilibrium is approached? Justify your answer using your ranking from part (a).