Question

Which of the following is an endothermic process? \((g=\text{gas})\)

• A. \(\mathrm{Xe(g)+e^- \rightarrow Xe^-(g)}\)
• B. \(\mathrm{O(g)+e^- \rightarrow O^-(g)}\)
• C. \(\mathrm{Cl(g)+e^- \rightarrow Cl^-(g)}\)
• D. \(\mathrm{I(g)+e^- \rightarrow I^-(g)}\)

Hint:

Electron gain is generally exothermic for non-metals. \[ \boxed{\text{Noble gases have positive electron affinity (endothermic).}} \]

Answer 1

The Correct Option is A