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JAMB Chemistry 2004 Question 29

Question 29

Chemical Equilibrium

N2O4(g) ⇌ 2NO2(g)
In the endothermic reaction above, more product formation will be favoured by

  1. A.a constant volume
  2. B.an increase in pressure
  3. C.a decrease in pressure
  4. D.a decrease in volume
Show the answer and explanation

Answer: C (a decrease in pressure)

Explanation

One gas molecule gives two, so lowering the pressure shifts the equilibrium towards the side with more molecules, NO2.