Scientific journal
Название журнала на английском
ISSN 2500-0802
ПИ №ФС77-61154

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SPECIFIC HEAT CAPACITY AND ENTHROPY LNCRO3

Suponitsry Y.L. 1 Liashenko S.E. 1
1 Mendeleyev University of Chemical Technology of Russia (MUCTR)
This paper is devoted to investigations of thermodynamic properties of rare earth trioxochromates(+3). Several computational methods to increase knowledge on the thermodynamics of REE trioxochromates(+3) were used. Our own and literary data on thermodynamic parameters for trioxochromate(+3) with composition LnCrO3 were systematized. On the base of comparative calculation method a linear relationship between the temperature dependence for the yttrium trioxochromate(+3) specific heat capacity and the temperature dependences for specific heat capacities of La, Ce, Nd, Gd, Dy, Ho and Yb trioxochromates(+3) and in addition, for La, Ce, Nd and Gd trioxochromates(+3) literary data were extended up to 1800K. By computational methods the temperature dependences for the specific heat capacities were expanded to 2000K. Using empirical relationships ∆Sºf,298 for trioxochromates(+3) of a number of REE was estimated and the standard Gibbs energy for desired compounds formation was calculated.