The table below presents thermodynamic data for the dissociation reaction of acetic acid, CH3COOH And of acetic trichloroacetic acid CCl3COOOH. CH3COOH(l) + H2O(l) ⇄ CH3COO(aq)− + H3O(aq)+ CCl3COOH(l) + H2O(l) ⇄ CCl3COO(aq)− + H3O(aq)+ Kc (25°C) ΔS° (J/mol·K) ΔH° (kJ/mol) ΔG° (kJ/mol) 1.77×10 -5 -2.51 27.12 CH3COOH -13.66 3.93 CCl3COOOH Explain the negative sign of ΔS to the dissociation reaction of triacid

The table below presents thermodynamic data for the dissociation reaction of acetic acid, CH3COOH And of acetic trichloroacetic acid CCl3COOOH. CH3COOH(l) + H2O(l) ⇄ CH3COO(aq)− + H3O(aq)+ CCl3COOH(l) + H2O(l) ⇄ CCl3COO(aq)− + H3O(aq)+ Kc (25°C) ΔS° (J/mol·K) ΔH° (kJ/mol) ΔG° (kJ/mol) 1.77×10 -5 -2.51 27.12 CH3COOH -13.66 3.93 CCl3COOOH Explain the negative sign of ΔS to the dissociation reaction of triacid

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter16: Thermodynamics: Directionality Of Chemical Reactions

Section: Chapter Questions

Problem 91QRT: Actually, the carbon in CO2(g) is thermodynamically unstable with respect to the carbon in calcium...

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The table below presents thermodynamic data for the dissociation reaction of acetic acid, CH3COOH And of acetic trichloroacetic acid CCl3COOOH. CH3COOH(l) + H2O(l) ⇄ CH3COO(aq)− + H3O(aq)+ CCl3COOH(l) + H2O(l) ⇄ CCl3COO(aq)− + H3O(aq)+ a. What is the value of °ΔS in C°25 To the dissociation reaction of acetic acid? show calculations. b. What is the value of Kc in 25oC To the dissociation reaction of trichloroacidAcetic? Show calculations. b.2. Explain the difference between the Kc value of CCl3COOOH and that ofCH3COOH based on acid structure. c. Will the value of Kc at 35 ° C for acetic acid, CH3COOH, be small / equal/ Greater than its value at 25 ° C? Explain. d. Explain the negative sign of ΔS to the dissociation reaction of triacidAcetic chlorine, CCl3COOOH. Kc (25°C) ΔS° (J/mol·K) ΔH° (kJ/mol) ΔG° (kJ/mol) 1.77×10 -5 -2.51 27.12 CH3COOH -13.66 3.93 CCl3COOOH
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