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JAMB Chemistry 1983 Question 46

Question 46

Energy Changes

When sodium dioxonitrate (III) (NaNO2) dissolves in water, ΔH is positive. The process of dissolution is

  1. A.exothermic
  2. B.endothermic
  3. C.isothermal
  4. D.isomeric
  5. E.hygroscopic
Show the answer and explanation

Answer: B (endothermic)

Explanation

A positive ΔH means heat is absorbed from the surroundings, so dissolving is endothermic.