On Correlation Between Heat Capacity and Thermal Expansivity of Cubic Pt-Metals (Following to the John Arblaster’s Evaluations)
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Vladimir Yu. Bodryakov, Institute of Mathematics, Informatics and Information Technologies, Ural State Pedagogical University, Yekaterinburg, Russia.
The correlation has been studied between heat capacity C(T) and volume coefficient of thermal expansion (T) for four Pt-metals with FCC structures (Pt, Pd, Rh, Ir) basing on John Arblaster’s detailed evaluations of their thermodynamic properties. It is shown that for all four metals direct close correlation (C) takes place not only at low temperatures, where it’s linear and known as Grüneisen law, but in the whole temperature range up to the melting points. Linear correlation dependences (C) abruptly change its slopes at about point where heat capacities reach classic Dulong-Petit limit of 3R. Comparison of the results for Pt-metals has been done with those for FCC silver taken as appropriate standard solid.
Coefficient of Thermal Expansion, Correlation, Heat Capacity, Pt - Metals, Silver
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