For the reaction: Cl_{2}(g) → 2Cl(g), _______.

(A) ΔH is positive, ΔS is positive

(B) ΔH is positive, ΔS is negative

(C) ΔH is negative, ΔS is negative

(D) ΔH is negative, ΔS is positive

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#### Solution

(A) ΔH is positive, ΔS is positive

ΔH is positive as energy is required for bond breaking. ΔS is positive as the number of gaseous species increases.

Concept: Chemical Thermodynamics and Energetic - Enthalpy of Bond Dissociation

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