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Theoretical evaluation of ultrasonic velocity and viscosity in binary mixtures of amides with anisic aldehyde

Author(s): P.B.Sandhya Sri, Zareena Begum, C.Rambabu

Theoretical values of ultrasonic velocity in binary liquidmixtures of anisic aldehyde+formamide, anisic aldehyde +N,N-dimethyl formamide and anisic aldehyde+ N,N-dimethyl acetamide have been evaluated at 303.15,308.15,313.15 and 318.15K usingNomotoÂÂÂ’s relation, idealmixing relation (IMR) impedance dependence relation(IDR), RaoÂÂÂ’s velocity method (RVM), JunjieÂÂÂ’smethod (JM) and Danusso relation. The relative merit of these theoretical relations were examined by comparing the theoretical values of ultrasonic velocity with the values obtained experimentally. The validity of the theories was checked by applying the chi-square test for goodness of fit and by calculating the average percentage error (APE). The viscosity data are correlated with some of the semi - empirical viscositymodels such as Grunberg and Nissan, Katti– Chaudhri, Heric and Brewer and Hind, and the results are compared with the experimental results.

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