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Citation: Chen De-Zhan, Ju Guan-Zhi. Thermodynamic and Kinetic Study on Reactions OH+C₂H₂ and OH+C₂H₄[J]. Acta Physico-Chimica Sinica, ;1992, 8(02): 236-239. doi: 10.3866/PKU.WHXB19920218 shu

Thermodynamic and Kinetic Study on Reactions OH+C₂H₂ and OH+C₂H₄

1.
Department of Chemistry, Shandong Normal University, Jinan 250014; Theoretical Chemistry Laboratory, Shandong University, Jinan 250100

Received Date: 30 October 1990
Available Online: 15 April 1992

The reactions of OH radical with C_2H_2 and C_2H_4 have been studied with ther- modynamic and kinetic methods based on ab initio level. The changes of the ther-modynamic function of the reactions were calculated at a range of 200-1600 K of temperature. The results indicate that both of the reactions are exothermic, which is 135.60±2.76 and 100.58±7.32 kJ·mol~(-1) respectively at the cited temperature in-tervals. The reaction of OH radical with C_2H_2 can proceed easier than with C_2H_4. Also, the A factor and the rate constant of the reactions were calculated with transition state theory. Pressure dependence of the rate constants was found. At 298 K, 80.0 kPa, the rate constant k_1 equals 5.09×10~5 m~3·mol~(-1)·s~(-1), the experimental data is (4.49±1.63)×10~5 m~3·mol~(-1)·s~(-1); at 299.2 K, 88.31 kPa, k_2 is equal to 6.64×10~6 m~3·mol~(-1)·s~(-1), and the experimental data is (4.73±4.76)×10~6 m~3·mol~(-1)·s~(-1), which are in od agreement.
- Addition on ethylene; Addition on acetylene; Thermodynamic; Kinetic
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Thermodynamic and Kinetic Study on Reactions OH+C2H2 and OH+C2H4

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通讯作者: 陈斌, bchen63@163.com

Thermodynamic and Kinetic Study on Reactions OH+C₂H₂ and OH+C₂H₄