Abstract
FROM the data heretofore available in regard to the observed ultrasonic absorption and its ratio to the coefficient calculated on the basis of Stokes's and Kirchhoff's theories, the various organic liquids have been broadly classified1,2 into four groups. Confining our attention to temperature variation alone, we find that, according to this classification, members of group A consisting of non-associated polyatomic liquids, are expected to show a positive temperature coefficient of absorption, whereas the liquids in the other groups are expected to show a negative temperature coefficient. It may be remarked, however, that the grouping and also the temperature coefficient assigned to each group are on an empirical basis.
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PARTHASARATHY, S., PANCHOLY, M. & CHHAPGAR, A. Temperature Coefficient of Ultrasonic Absorption in Organic Liquids. Nature 181, 405–406 (1958). https://doi.org/10.1038/181405a0
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DOI: https://doi.org/10.1038/181405a0
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