Abstract
The viscosities of n-alkyl chlorides from pentyl to hexadecyl chloride were determined at temperatures between 15 to 80°C at 5°C intervals. The intrinsic volumes of the n-alkyl chlorides were determined by extrapolation of the plot of fluidity against molar volume to zero fluidity. Plots of the logarithm of viscosity vs. reciprocal absolute temperature were almost linear. The energies of activation for viscous flow for the n-alkyl chlorides were calculated and found to increase with increase in chain length. The fluidities, Φ, of the n-alkyl chlorides were found to obey the modified form of Hildebrand's equation.Φ = D[(V-Vo/Vo]\exp(-EB/RT) where D is a constant, V and V o are the molar volume and the intrinsic molar volume, respectively, and E B is an energy term corresponding to the energy required for disrupting the association of the molecules. The activation energy for viscous flow consists of the sum of the energy required for the expansion of the void volume and the energy required to overcome intermolecular interactions. These energies were calculated and discussed.
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Seng, C.E., Teoh, S.B. & Liew, K.Y. Viscosities of n-Alkyl Chlorides from 15 to 80°C. Journal of Solution Chemistry 27, 761–770 (1998). https://doi.org/10.1023/A:1022661708411
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DOI: https://doi.org/10.1023/A:1022661708411