Conversion relationship between cp and cv

The conversion relationship between cp and cv depends on the nature and state of the substance. According to relevant public information, cp represents the heat absorbed or released by a substance when its unit mass temperature changes under the condition of equal pressure, and cv represents the heat absorbed or released by a substance when its unit mass temperature changes under the condition of equal pressure. The conversion relationship between cp and cv depends on the nature and state of the substance. For solids, liquids and gases, the heat capacity varies with temperature, pressure and other factors.