Which of the following processes are expected to be exothermic? Give reasons for your answers.
(a) Na+(g) + Br(g) ⇾ NaBr(s)
(b) Mg(g) ⇾ Mg2(g) + 2e“
(c) MgCl2(s) ⇾Mg(s) + Cl2(g)
(d) O(g) + 2e_ ⇾ O2 (g)
(e) Cu(l) ⇾ Cu(s)
(f) Cu(s) ⇾ Cu(g)
(g) KF(s) ⇾ - K+(g) + F–(g) .
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