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The summary increment of an entropy in open systems in which proceed opposite processes

100%

Pelińska-Olko E.

tom Vol. 13, spec. iss. 1/2

59--65

The entropy is the important thermodynamic function in help which we can obtain "goodness" of the both right-way and left-way cycles. The concept of the efficiency of the ideal cycles mentioned above is often used in technique. This paper is connected with the summary increment of the entropy obtained for the mutually opposite processes, for example in open systems solid body -its gaseous neighbourhood. The mutually opposite processes are defined as the processes proceeding in the some temperature ranges but in the opposite directions fig.2. It is proved that the summary increments of an entropy are for a cooling higher than in case of a heating, additionally their difference growth with the growth of a temperature range. It is introduced the concept of the relative increment of en entropy for the mutually opposite processes, which could have the significance for a industry.

Description of experimental data in thermodynamics analysis of binary solutions.

80%

Jarosz P. , Sukiennik M. , Gargul K. , Gierlotka W.

tom R. XXII, nr 4

392-393

In this work one analysed influence of manner of description of experimental data on counted values of thermodynamical function in binary solution. One ascertained, that large meanings in widened thermodynamical analysis of binary solutions has acquaintance of structural coefficients. It is possible to obtain the reliable results from phase diagram only using interpolation methods. One showed on the ground of thermodynamical analysis of solution Hg-In, that description of activity with functions cubic spline permits on qualification stochiometrics of intermetallic compounds.