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16 Nov 2019
For the reaction beloW. CO2 + a. Determine whether the reaction is energetically favorable at room temperature. Assume that AS-0. Calculate the gas phase enthalpy change using bond dissociation enthalpies at 25°C from the table below. tion tion Bond Bond Enthalpy kJ (kcal/mo Enthalpy BondEnthalpy kJ (kcalVmol kJ (kcalVmol 435 (104) 439 (105) CC 376 (90) C-N 355 (85) C-O | 385 (92) C-O(aldehyde) 728 (174) C=O (CO2) | 803 (192) CEO H-H C-H (-CH3 ) | 422 (101) C-HCH2464 (111)C238 (57) C-H CH) 556 (133) N-H 1075 (257) 950 (227) 966 (231) 498 (119) C-Si 301 (72) C=C | 727 (174) 391 (93) 318 (76) Hint: Be aware that the bond energy for the C-H bond varies considerably and may change during the reaction; therefore, you will find several entries for C-H bonds in the table. Include the algebraic sign and specify units, e.g. -45 kJ/mol. Calculate to the nearest single energy unit. b. Is the reaction exothermic or endothermic?
For the reaction beloW. CO2 + a. Determine whether the reaction is energetically favorable at room temperature. Assume that AS-0. Calculate the gas phase enthalpy change using bond dissociation enthalpies at 25°C from the table below. tion tion Bond Bond Enthalpy kJ (kcal/mo Enthalpy BondEnthalpy kJ (kcalVmol kJ (kcalVmol 435 (104) 439 (105) CC 376 (90) C-N 355 (85) C-O | 385 (92) C-O(aldehyde) 728 (174) C=O (CO2) | 803 (192) CEO H-H C-H (-CH3 ) | 422 (101) C-HCH2464 (111)C238 (57) C-H CH) 556 (133) N-H 1075 (257) 950 (227) 966 (231) 498 (119) C-Si 301 (72) C=C | 727 (174) 391 (93) 318 (76) Hint: Be aware that the bond energy for the C-H bond varies considerably and may change during the reaction; therefore, you will find several entries for C-H bonds in the table. Include the algebraic sign and specify units, e.g. -45 kJ/mol. Calculate to the nearest single energy unit. b. Is the reaction exothermic or endothermic?
Jarrod RobelLv2
20 Apr 2019