General behavior of heat capacity and volume-energy relation in materials

A new model of heat capacity is established for solid and liquid materials in the wide temperature range recently, and shows that heat capacity is also dependent on thermal expansion or volume. In this study, we further analyzed the physical meaning of the parameters in the model, and perfected the heat capacity model. The calculated heat capacity in the perfected model is well in accord with the experimental results. And a universal volume-energy relation in materials is predicted by the model, and has important theoretical value.