In the reaction represented by the equation N2(g) + 3H2(g)= 2NH3(g), the
forward reaction is exothermic. Which set of conditions would give the best
yield of ammonia at equilibrium?
A) 800 atmospheres and 2000 oC
B) 1 atmosphere and 500 oC
C) 1 atmosphere and 2000 oC
D) 800 atmospheres and 500 oC

Question

In the reaction represented by the equation N2(g) + 3H2(g)= 2NH3(g), the
forward reaction is exothermic. Which set of conditions would give the best
yield of ammonia at equilibrium?
A) 800 atmospheres and 2000 oC
B) 1 atmosphere and 500 oC
C) 1 atmosphere and 2000 oC
D) 800 atmospheres and 500 oC

btaylor · Answer

because of Le Chatelier's principle, you want a higher pressure (because it wil shift to the side with fewer moles) and a low temperature, so the system wants to create more heat. So 800 atm and 500 C (answer D) is the best choice.

anonymous · Answer

OK THANKS !