Thermodynamic Properties of Propane

Temperature Pressure Density Volume Int. energy Enthalpy Entropy C, CT Sound speed Joule-Thomson Therm, cond. Viscosity 

Temperature K Pressure MPa Density mol/dm3 Volume dm3/mol Int. energy kj/mol Enthalpy kj/mol Entropy kJ/(mol-K) c, kJ/(mol-K) Cr kJ/(mol K) Sound speed m/s Joule-Thomson K/MPa Therm, cond. mW/(m-K) Viscosity pPa s 

The values in these tables were generated from the NIST REFPROP software (Lemmon, E. W., McLinden, M. O., and Huber, M. L., NIST Standard Reference Database 23 Reference Fluid Thermodynamic and Transport Properties—REFPROP, National Institute of Standards and Technology, Standard Reference Data Program, Gaithersburg, Md., 2002, Version 7.1). The primary source for the thermodynamic properties is Buecker, D., and Wagner, W., Reference Equations of State for the Thermodynamic Properties of Fluid Phase n-Butane and Isobutane, /. Phys. Chem. Ref Data 35(2) 929-1019,2006. The source for viscosity is Vogel, E., Kuechenmeister, C., Bich, E., and Laesecke, A., Reference Correlation of the Viscosity of Propane, /. Phys. Chem. Ref. Data 27(5) 947-970,1998. The source for thermal conductivity is Marsh, K., Perkins, R., and Ramires, M. L. V., Measurement and Correlation of the Thermal Conductivity of Propane from 86 to 600 K at Pressures to 70 MPa, /. Chem. Eng. Data 47(4) 932-940, 2002. 

Typical uncertainties in density are 0.02% in the liquid phase, 0.05% in the vapor phase and at supercritical temperatures, and 0.1% in the critical region, except very near the critical point, where the uncertainty in pressure is 0.1%. For vapor pressures, the uncertainty is 0.02% above 180 K, 0.05% above 1 Pa (115 K),and dropping to 0.001 mPa at the triple point. The uncertainty in heat capacity (isobaric, isochoric, and saturated) is 0.5% at temperatures above 125 K and 2% at temperatures below 125 K for the liquid, and is 0.5% for all vapor states. The uncertainty7 in the liquid-phase speed of sound is 0.5%, and that for the vapor phase is 0.05%. The uncertainties are higher for all properties very near the critical point except pressure (saturated vapor/liquid and single phase). The uncertainty in viscosity varies from 0.4% in the dilute gas between room temperature and 600 K, to about 2.5% from 100 to 475 K up to about 30 MPa, and to about 4% outside this range. Uncertainty in thermal conductivity is 3%, except in the critical region and dilute gas which have an uncertainty of 5%. 

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Lemmon, E.W, McLinden, M.O., and Wagner, W, Thermodynamic Properties of Propane. III. A Reference Equation of State for Temperatures from the Melting Line to 650 K and Pressures up to 1000 MPa, submitted to /. Chem. Eng. Data, 2009. 

The thermodynamic properties of propane are obtained from a modified BWR equation as above. Note that states 1 and 2 are both vapor. The rate of lost work in kilowatts is... 

Next, the lost work is calculated assuming that the power-recovery turbine and the compressor operate isentropically. Also, the rate of heat transfer in the refrigerant evaporator is assumed to be the same as for the original cycle (597,200 Btu/hr, as calculated above). Required thermodynamic properties of propane for the revised cycle are... 

Thermodynamic contributions from the internal rotation of several symmetric tops may be readily calculated by appropriate summation of terms in Table 4. Few reliable calculations, however, have been reported. Thermodynamic properties of propane and several methyl-substituted benzenes have been reported, for example, but subsequent more accurate work has shown the necessity for considering that the internal rotation may be restricted. " Although the subsequent calculations for m-xylene and p-xylene used 6-fold internal rotation barriers of 2.1 to 3.1 kJ mol", more recent statistical calculations for toluene employing the presence of free rotation suggest that internal rotation in the two xylenes may be effectively unrestricted. 

Thermodynamic Properties of n-Hexane Thermodynamic Properties of Propane Thermodynamic Properties of Hydrogen... 

Sychev, V. V., Vasserman, A. A, Kozlov, A. D., and Tsymarny, V. A., Thermodynamic Properties of Propane, Standards Publishing House, Moscow, 1989. 

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