Consider the reaction for the decompositon of carbon tetrachloride gas: CCl4(g) ⟶ C(s, graphite) + 2 Cl2(g) ΔH = +95.7 kJ; ΔS = +142.2 J/K (a) Calculate ΔG at 25°C and determine whether the reaction is spontaneous. (b) If the reaction is not spontaneous at 25°C, determine at what temperature (if any) thereaction becomes spontaneous.

Chemistry: Principles and Practice
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Chapter17: Chemcial Thermodynamics
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Problem 17.15QE
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Consider the reaction for the decompositon of carbon tetrachloride gas:

CCl4(g) ⟶ C(s, graphite) + 2 Cl2(g) ΔH = +95.7 kJ; ΔS = +142.2 J/K

(a) Calculate ΔG at 25°C and determine whether the reaction is spontaneous.

(b) If the reaction is not spontaneous at 25°C, determine at what temperature (if any) thereaction becomes spontaneous.

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