Question

In the given reaction,
$ 2X(g) + Y(g) \leftrightharpoons 2Z(g)+80\,kcal., $
Which combination of pressure and temperature will give the highest yield of $ Z $ at equilibrium?

• A. 1000 arm and $ 200{}^\circ C $
• B. 500 atm and $ 500{}^\circ C $
• C. 1000 atm and $ 100{}^\circ C $
• D. 500 atm and $ 100{}^\circ C $
• E. 1000 atm and $ 500{}^\circ C $

Answer 1

Answer: (C)

In this equation, volume is decreasing and the reaction is exothermic. So, for the highest yield of $ Z $ , pressure should be high and temperature should be low.