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JAMB Chemistry 1980 Question 48

Question 48

Energy Changes

An endothermic reaction is one during which heat is.........and can be represented by the symbol.......Which of the following combinations can be used accurately to complete the above definition?

  1. A.liberated, -ΔH
  2. B.liberated, +ΔH
  3. C.absorbed, -ΔH
  4. D.absorbed, + ΔH
  5. E.absorbed, + ΔG.
Show the answer and explanation

Answer: D (absorbed, + ΔH)

Explanation

An endothermic reaction takes in heat from the surroundings, so its enthalpy change ΔH is positive.