HSC Science (Computer Science) 12th Board ExamMaharashtra State Board
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For the Reaction: Cl2(G) → 2cl(G) - HSC Science (Computer Science) 12th Board Exam - 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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Solution For the Reaction: Cl2(G) → 2cl(G) Concept: Chemical Thermodynamics and Energetic - Enthalpy of Bond Dissociation.
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