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JAMB Chemistry 1979 Question 37

Question 37

Energy Changes

The reaction 3C(s) + 2Fe2O3(s) = 4Fe(s) + 3CO2(g); ΔH = 46.0 kJ is

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

Answer: C (endothermic)

Explanation

ΔH is positive (+46.0 kJ), so the reaction absorbs heat: it is endothermic.