Effect of copper on the heat capacity and change of the thermodynamic functions of lead

In this work, the heat capacity of lead and copper alloys was determined in cooling mode from the known heat capacity of a reference sample made of copper grade M00. Polynomials that describe the temperature dependence of the heat capacity and changes in the thermodynamic functions of the alloys were obtained. It was found that, on the whole, the heat capacity, enthalpy, and entropy of alloys increase upon an increase in the temperature and copper content, while the Gibbs energy decreases.