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For the Reaction: Cl2(G) → 2cl(G) - Chemistry

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Question

For the reaction: Cl2(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

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.

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For the Reaction: Cl2(G) → 2cl(G) Concept: Chemical Thermodynamics and Energetic - Enthalpy of Bond Dissociation.
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