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Abstract
The heat capacity of sodium-alloyed lead babbitt BNa (PbSb15Sn10Na) is determined experimentally, and the temperature dependences of the changes in the thermodynamic functions of this alloy are calculated. The temperature dependence of the heat capacity of babbitt BNa is studied in the cooling mode using the SigmaPlot 10.0 software. Polynomials are determined for the temperature dependences of the heat capacity and the changes in the thermodynamic functions (enthalpy, entropy, and Gibbs free energy) of babbitt BNa and a reference sample (S00-grade Pb), that describe these dependences with coefficient of correlation Rcorr = 0.999. It is shown that the heat capacity of babbitt BNa grows along with the content of sodium, its enthalpy and entropy grow along with temperature and the content of sodium, and its Gibbs energy falls.
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