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What does ∆H represent in the following equation ? Cl(g) + e- → CI- (g);...

Chemistry
WAEC 2001

What does ∆H represent in the following equation ? Cl(g) + e- → CI- (g); ∆H = - 363 kJ mol-1

  • A. lonization energy
  • B. Electron affinity
  • C. Dissociation energy
  • D. Heat of atomization
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Correct Answer: Option B
Explanation

Electron affinity is defined as the amount of energy released when an electron is added to a neutral atom to form an anion. 

From the reaction, an electron is added to a neutral atom, Cl, and an anion Cl- is formed. Therefore, the correct answer is option B

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