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JAMB Chemistry 1981 Question 24

Question 24

Energy Changes

When sodium nitrite dissolves in water, ΔH is positive. This means that

  1. A.the reaction is catalysed
  2. B.the reaction is complete
  3. C.the reaction is exothermic
  4. D.the reaction is endothermic
  5. E.sodium nitrite is highly soluble in water
Show the answer and explanation

Answer: D (the reaction is endothermic)

Explanation

A positive ΔH means heat is taken in from the surroundings, which is an endothermic change.