Abstract
The heat capacity of Pt(C5H7O2)2 molecular crystal was measured in the temperature range of 239–515 K. Using data on the heat capacity, the most important thermodynamic and physical characteristics of Pt(C5H7O2)2 were obtained. The density of states g(ω) and characteristic temperatures related to the moments of the g(ω) were obtained. We demonstrate the possibility to calculate the molar zero-point energy from the experiment with high accuracy. The isobaric thermodynamic functions (entropy, enthalpy and reduced Gibbs energy) were calculated. Using the information about g(ω), the isochoric thermodynamic functions (heat capacity, entropy, internal energy and reduced Helmholtz energy) up to the melting point were calculated. The knowledge of zero-point energy allowed calculating the total enthalpy and total internal energy of Pt(C5H7O2)2. A detailed analysis of the accuracy of the obtained characteristics was provided. The approach used to obtain the important characteristics of solids is general and can be used to study a wide range of objects.
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