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- Briefly outline the Woodward-Hoffman description and explain how they can be used to predict if a pericyclic reaction will occur thermally or photochemically.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 CCl3COOOHWhy does the first reaction, but not the second, give ring expansion?
- What is the change in molar conformational entropy when the same random coil is stretched from fully coiled by 10 per cent?What is the std heat of reaction at 800 degrees celsius (1073.15K) for a complete combustion of liquid ethanol (C2H5OH) to carbon dioxide (CO2) and liquid water (H2O)?For the reaction 5Ce4+ + Mn 2+ + 4H2 O → 5Ce3+ + MnO4- + 8H+ , given E0 (Ce4+ /Ce3+ ) = 1.70V,E0 (MnO4- /Mn2+ ) = 1.507V, calculate ΔG0 for this reaction ?
- From the following reaction and data, find (a) S° of SOCl₂ and (b) Tat which the reaction becomes nonspontaneous:SO₃(g) +SCl₂(l) → SOCl₂(l) +SO₂(g) ΔG°ᵣₙₓ =-75.2 kJWrite the chemical equations involved for the reaction of cyclohexene with cold KMnO4The 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 triacidAcetic chlorine, CCl3COOOH.