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JAMB Chemistry 2002 Question 13

Question 13

Energy Changes

When dissolved in water, NaOH flakes show

  1. A.an endothermic change
  2. B.an exothermic change
  3. C.a slow reaction
  4. D.a rapid reaction.
Show the answer and explanation

Answer: B (an exothermic change)

Explanation

Dissolving sodium hydroxide gives out a lot of heat (the solution gets hot), so it is an exothermic change.