Speeds of sound and isentropic compressibilities of { x CH 3 O(CH 2 ) 2 OH+(1- x )H(CH 2 ) nu (OCH 2 CH 2 ) 2 OH} (nu=1, 2, and 4) at the temperature 298.15 K

Author： Pal A. Singh W.

Publisher： Academic Press

ISSN： 0021-9614

Source： Journal of Chemical Thermodynamics, Vol.29, Iss.6, 1997-06, pp. : 639-648

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Abstract

The speed of sound u has been obtained at a frequency of 4 MHz in { x CH 3 O(CH 2 ) 2 OH+(1- x )H(CH 2 ) nu (OCH 2 CH 2 ) 2 OH} for nu=1, 2 and 4 over the whole range of x at T =298.15 K and atmospheric pressure, using a NUSONIC velocimeter based on the sing-around technique. The excess molar volumes were taken from a previous paper and combined with the measured values of the ultrasonic speeds to give estimates of the product K S,m of the molar volume and the isentropic compressibility kappa S , and the excess quantity K S,m E . The deviations of the speeds of sound u D were compared with the mixing function delta u calculated in the paper. The behaviour of u , u D , delta u , and K S,m E with composition and number of carbon atoms in the aliphatic chain of the alkoxyethanol is discussed.