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When Magnesium reacts with oxygen, heat is 

Chemistry
WAEC 2017

When Magnesium reacts with oxygen, heat is 

  • A. absorbed and the reaction is endothermic
  • B. evolved and the reaction is endothermic
  • C. evolved and the reaction is exothermic
  • D. absorbed and the reaction is exothermic
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Correct Answer: Option C
Explanation

The Magnesium actually reacts with oxygen in the air, is burnt and produces a bright light. The bright light emits a lot of heat so the reaction is exothermic.

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