Anhenius plots

At high temperatures there is experimental evidence tlrat the Anhenius plot for some metals is curved, indicating an increased rate of diffusion over tlrat obtained by linear exU apolation of tire lower temperature data. This effect is interpreted to indicate enhanced diffusion via divacancies, rather tlrair single vacaircy-atom exchange. The diffusion coefficient must now be represented by an Anheirius equation in the form... 

Fig. 26. Anhenius plot for the initial rate of gd formation in (V>EPTM ((V) = 0.319 mol/1)...

The investigated HfOj-ZrOj-YjOj electrolyte systems exhibited linear Anhenius plots of the lattice conductivity as a function of tanperature. The difference in ionic conductivities between HfOj-ZrOj-YjOj and ZrOj-YjOj solid electrolytes deCTeases... 

Figure 212. Anhenius plots of kh k and kh for kallikrein inactivation in aqueous solution at pH 7.4. Rate constants A. A. and A. were calculated according to the reaction scheme in Eq. (5.1). (Reproduced from Ref. 879 with permission.)...

A composite Anhenius plot of all the data is shown in Fig. 16. The data obtained from relative rate measurements have been corrected to be consistent... 

Figure 16.32. Anhenius plot of first-order rate constants of polythiophene ageing at 80°, 175°, 250° and 400°C from FTIR studies. Adapted from Synth. Met. 66, 33 (1994),with permission of Elsevier Science S.A., Lausanne.

Since the straight lines for both crystal forms are parallel, we can conclude that the activation energies for diffusion are the same. Also, the frequency factors on an Anhenius plot can be seen to have very small differences. These equations fit almost all of the experimental results within 5%. 

Fig. 4. Anhenius plot for the intrinsic [91 Mol] and mass transfer self-diflfusivities on Si(100), showing convergence near the [94Keel].

Figure 17.43. Anhenius plot for ibt roWtoosl oaoehtlon times of RNsse Ti. Data frmn Ref. SO.

Rudzinski W., Borowiecki T., Panczyk T., and Dominko A., On the Applicability of Anhenius Plot Methods to Determine Surfoce Energetic Heterogeneity of Adsorbmts and Catalysts Surfrices from Experimental TPD Spectra, Adv. Coll. Interface ScL, 84... 

Fig. 3.10 Extrapolated Anhenius plot for PC eind PET hydrolysis normalized to 100 % RH assuming kinetics second order in RH. Feulure times need to be divided by [RHf to find the fail time at a particular RH...

Figure 8.15 shows the initial stage of weight change of LLDPE by thermal aging at varions temperatures ranging from 90 to 170 °C. The Anhenius plot of the induction period of the samples which have different concentration of antioxidant reagent was shown in Fig. 8.16. The slope of the lines was almost the same. The apparent activation energy was 136 kJ/mol.

Figure 2. Anhenius plot of the solubility product of VC and VN in austenite from Table 2 (Tin K, compositions in wt%). The ratio ATvc/ vn is plotted in dashed line.

Log fJo-T data consists of triple Anhenius plots whose intersections locate T/i and Tip,... 

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