Abstract
A novel method for the determination of rate constants of reactions, the time-variable method, is proposed in this paper. The method needs only three time points (t), peak heights (Δ) and pre-peak areas (α), obtained from the measured thermoanalytical curve. It does not require the thermokinetic reaction to be completed. It utilizes data-processing on a computer to give the rate constants. Four reaction systems, including a first-order reaction, second-order reactions (with equal concentrations and with unequal concentrations) and a third-order reaction, were studied with this method. The method was validated and its theoretical basis was verified by the experimental results.
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References
Y. Deng, Chem. J. Chinese Univ., 6 (1985) 621.
Y. Deng, Z. M. Qin and X. P. Wu, Thermochim. Acta, 123 (1988) 313.
Y. Deng, X. C. Zeng and Y. Q. Zhang, Thermochim. Acta, 169 (1990) 223.
J. S. Liu, X. C. Zeng, A. M. Tian and Y. Deng, Thermochim. Acta, 231 (1994) 39.
X. C. Zeng, Y. Q. Zhang, X. G. Meng and A. M. Tian, Thermochim. Acta, 293 (1997) 171.
W. Hemminger and G. Hohne, Calorimetry, Fundamentals and Practice, Weinheim, Basel 1984.
E. Anis, J. Am. Chem. Soc., 71 (1949) 2112.
A. A. Smith and H. S. Levenson, J. Am. Chem. Soc., 61 (1939) 1172.
J. N. Bronsted and M. Kilpatrick, J. Am. Chem. Soc., 51 (1929) 428.
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Zeng, X.C., Chen, Y., Cheng, S.Q. et al. Time-variable Method for Studying Reaction Rates in a Calorimeter. Journal of Thermal Analysis and Calorimetry 58, 477–485 (1999). https://doi.org/10.1023/A:1010132011480
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DOI: https://doi.org/10.1023/A:1010132011480