Melting points of propane and isopentane

At standard atmospheric pressure (0.1 MPa), the melting point of propane is -187.7 °C, and that of isopentane is -159.6 °C. However, I cannot directly provide you with the exact melting point data at a pressure of 3 MPa, as this requires specific thermodynamic data related to the substance in question. Such data often needs to be obtained through experiments or by consulting detailed chemical engineering data handbooks. Furthermore, these data may not be listed directly, but rather represented through phase diagrams or P-T diagrams (pressure-temperature diagrams), and users need to interpret them based on these charts. As for mixed refrigerants, since the freezing point (or crystallization point) of a refrigerant depends on its components and the interactions between them, it is likewise difficult to directly determine the freezing point of such a refrigerant mixture at a pressure of 3 MPa. The phase behavior of mixed refrigerants is much more complex, requiring consideration of the interactions between all components as well as the proportions of the mixture. Usually, these data are provided by the mixture designer or manufacturer, or determined through laboratory testing. In practical applications, if such specific thermodynamic data are required, it is recommended to consult more specialized chemical databases, contact the manufacturers, or conduct experimental measurements. For complex mixed refrigerants, thermal simulation software may also be required for calculations. .

It can be obtained from the property databases of software such as Aspen