**R40**

R40 provides high accuracy thermodynamic properties for R40 (also called chloromethane and methyl chloride), CH3Cl , MW 50.4875 g/gmole) using the Fundamental Equation of State presented in:

"A New Functional Form for Equations of State for Some Weakly Associating Fluids"

Monika Thol, Lorenzo Piazza, Roland Span

Int J Thermophys (2014) 35:783-811

The correlation is valid for temperatures in the range between 230 K and 630 K for pressures less than 100 MPa. Enthalpy and entropy values are referenced to 200 kJ/kg and 1 kJ/kg-K respectively for saturated liquid at 273.15 K.

__Transport properties and surface tension data are provided using correlations given in:__

Yaws, Carl L., ed. ** Chemical Properties Handbook**. New York: McGraw-Hill, 1999.