Contents - Index




Acetylene (alson called Ethyne) is C2H2 with CAS# 74-86-2). It has a molar mass of 27.037 kg/kmol.  Thermodynamic property data are provided for this substance using the Fundamental Equation of State determined by Gao, K., Wu, J., and Lemmon, E.W., at NIST.  This equation of state is unpublished and used in the REFPROP 10 program.  It is used here with permission from Eric Lemmon at NIST.  The equation of state is applicable from the triple point (191.75 K) to 310 K at pressures up to 10 MPa.



Viscosity (for the gas and liquid phases) and thermal conductivity (for the gas phase) are provided over the range of applicability of the equation of state correlations from:


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


The enthalpy of fusion, dipole moment, and surface tension data are aslo provided by Yaws.


The correlation for liquid phase thermoconductivity is applicable for temperatures between the triple point (277 K) and 305K.  It was derived using extended corresponding states using ethane as the reference fluid 

as described in:


McLinden, M.O., Klein, S.A.and Perkins, R.A.

"An extended corresponding states method for the thermal conductivity of refrigerants and refrigerant mixtures"

Int. J. Refrig, Vol. 23, pp. 43-63, 2000.




Fluid Property Information