Ultrasonic studies on binary mixtures of some aromatic ketones with acetonitrile at T=308.15K

Comment on the paper of Tangeda et al. entitled “Ultrasonic studies on binary mixtures of some aromatic ketones with acetonitrile at T=308.15K”

“…The authors interpreted the relatively large negative Dj S (x) values in terms of molecular interactions. However, as noted both in our previous paper [2] and many other literature reports [3][4][5], the estimation and discussion of intermolecular interactions from deviations calculated by equation (1) are unjustified and the results are rather misleading.…”

“…In the paper of Tangeda et al [1] published recently in this journal, the values of deviations of the isentropic compressibility, speed of sound, and intermolecular free-length have been calculated for four binary mixtures of acetonitrile with aromatic ketones at T = 308.15 K. The deviations of the isentropic compressibilities, Dj S (x), have been calculated as:…”

“…In equation (1), the reference state is not a thermodynamically ideal mixture, but a mole fraction average. Therefore, the physical meaning of Dj S (x) calculated in this way is lacking.…”

Ultrasonic Studies in Binary Liquid Mixtures Oftrichloroethylene With Three Alcohols at 303.15 K

“…The negative excess mean free length for all the three systems in the entire range of compositions also indicates the existence of strong interaction between the components. 47 Deviations in adiabatic compressibility can be explained in terms of its contributions made by the following factors: (a) The difference in size and shape of the component molecule leads to decrease in sound velocity and increase in adiabatic compressibility and (b) A decrease in free lengths as a result of dipole-dipole interactions or hydrogen bonded complex formation between unlike molecules leads to decrease of sound velocity and increase of compressibility.…”

Effects of Isentropic and Partial Molar Compressibility of Propiophenone with 1-Alkanols Binary Mixtures at 303.15 to 318.15 K

“…[14] 1.00724 [18] 1446.41 1458 [18] ; 1440 [14] 308.15 1.0015 1.00896 [15] 1427.038 1438 [18] ; 1432 [19] 1.00870 [16] 1.00600 [14] 313 [7] ,0.79557 [17] , 0.7966 [9] ,0.7963 [20] , 0.80632 [22] ,0.806 [23] 1197.9 1192 [7] , 1189 [17] 1193 [9] , 1191 [21] , 1205.45 [22] ; 202.47 [23] 308.15 0.7914 0.7917 [25] , 0.7915 [24] , 0.7915 [29] 1166.28 1172.04 [25] ,1171.41 [26] 313.15 0.7873 0.7872 [7] ,0.7877 [17] 1135.71 1158 [7] ,1155 [17] 318.15 0.7834 1109.83…”