For 2Cl(g) → Cl2(g), what are the signs of ΔH and ΔS?
AΔH positive, ΔS positive
BΔH negative, ΔS negative
CΔH positive, ΔS negative
DΔH negative, ΔS positive
Answer & Solution
Correct answer: B. ΔH negative, ΔS negative
Forming a Cl-Cl bond releases heat and two gas particles become one, so both ΔH and ΔS are negative.
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