Cоnsider the cоnversiоn of benzene C₆H₆ to mаleic аcid HOOC-CH=CH-COOH аt 298K according to the following reaction. 2C₆H₆ (l) + 9O₂ (g) + 4H₂O (l) → 2(HOOC-CH=CH-COOH) (s) + 4CO₂ (g) We would like to find out what is the reaction enthalpy, entropy and Gibbs free energy for the formation of maleic acid at 25oC and at 100oC in kJ/mol. Some useful information: HOOC-CH=CH-COOH (maleic acid) decomposes at 135oC, the boiling point of C₆H₆ (benzene) is 80.1oC, the molar heat capacity, Cp molar heat capacity of solid maleic acid reported as 135.6 J/(mol*K) at 294.4 K. The molar heat capacity of liquid benzene is 136 J/(mol*K), while the molar heat capacity of gaseous benzene is about 81.6 J/(mol·K) The molar heat capacity of liquid water is approximately 75.3 J/(mol*K) The molar heat capacity of water in the gas phase varies with temperature, but can be approximated with 33.5 J/(mol*K) The heat of vaporization ΔHvap of benzene is 30.77 kJ/mol at 80.1 °C (normal boiling point) and 33.9 kJ/mol at 25 °C (standard enthalpy of vaporization). Water has a heat of vaporization value of 40.65 kJ/mol at its boiling point of 100oC. Part A) Do you expect the entropy of this reaction at 298K to be positive, negative or around zero? Tick the box next to your selection below: Part B) Calculate the reaction enthalpy at 25oC and at 100oC. Useful tables are appended below this question. Show all calculations to arrive at your answer. Part C) Calculate the reaction entropy at 25oC and at 100oC. Useful tables are appended below this question. Show all calculations to arrive at your answer. Part D) Calculate the reaction Gibbs free energy at 25oC and at 100oC. Useful tables are appended below this question. Show all calculations to arrive at your answer. Part E) Is this process at 100oC spontaneous? Justify your answer. Useful tables: Solve this problem on paper, document your approach and provide intermediate results. Report the final answers with 3 significant figures. Scan the pages(s) and upload them for grading. Answer all parts A to E. Please do not enter any text in the box below.
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