Author： Dallos A. Hajos-Szikszay E. Liszi J.
Publisher： Academic Press
ISSN： 0021-9614
Source： Journal of Chemical Thermodynamics, Vol.30, Iss.2, 1998-02, pp. : 263-270
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
Enthalpies of solution for (L-ascorbic acid+water) have been measured in a SETARAM C80 D mixing calorimeter over the composition range of homogeneous solutions at temperatures of 298.15 K and 323.15 K. The results are reported in terms of excess molar enthalpies for {(xC 6 H 8 O 6 +(1-x)H 2 O} and molar enthalpies of solution for C 6 H 8 O 6 . The temperature and concentration dependence of the enthalpies of solution are given by a Redlich-Kister equation fitted with the experimental data. Enthalpies of crystallization of L-ascorbic acid in aqueous solutions have been measured at the temperatures (293.15, 298.15, and 303.15) K during unseeded programmed crystallization. The molar enthalpies of crystallization for C 6 H 8 O 6 obtained experimentally agree well with those calculated from partial molar enthalpies of solution data of C 6 H 8 O 6 .Copyright 1998 Academic Press Limited
Related content
Access to resources
Recommend
By Holder A.A. Brown R.F.G. Marshall S.C. Payne V.C.R. Cozier M.D. Alleyne W.A. Bovell C.O.
Transition Metal Chemistry, Vol. 25, Iss. 5, 2000-10 ,pp. :