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JAMB Chemistry 1995 Question 28

Question 28

Chemical Equilibrium

If an equilibrium reaction has ΔH < O, the reaction will proceed favourably in the forward reaction at

  1. A.low temperatures
  2. B.high temperatures
  3. C.all temperatures
  4. D.all pressures
Show the answer and explanation

Answer: A (low temperatures)

Explanation

ΔH < 0 means the forward reaction is exothermic. Lowering the temperature favours the heat-releasing direction, so the forward reaction is favoured at low temperatures.