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Some scientific and engineering data online

german

Calculation of thermodynamic state variables of methane

lower limit for calculation: -180 C, 0.25 bar      upper limit: 340 C, 2000 bar

Pressure:
Temperature:



Calculation of thermodynamic state variables of methane in saturation state, boiling curve

Lower limit for calculation: -180 C, 0.25 bar bar      upper limit: -85 C, 40 bar.

Pressure:
OR
Temperature:



The following thermodynamic properties will be calculated:
density, dynamic viscosity, kinematic viscosity, specific enthalpy, specific entropy, specific isobar heat capacity cp,, specific isochore heat capacity cp, speed of sound, coefficient of compressibility Z.

Calculation of Methane : if you found an error, please mail to: wischnewski@mpib-berlin.mpg.de. No garanty for correctness.

Thermodynamic constants of methane - CH4

molar mass
16.043 [ kg / kmol ]
gasconstant R
518.2705 [ J / (kg K) ]
isentropic exponent
1.304  
critical state variables:
pcrit
 45.922 [ bar ]
Tcrit
 190.564 or -82.586 [ K or C]
densitycrit
 62.66 [ kg / m3 ]
tripelpoint pressure
 0.11696 [ bar ]
tripelpoint temperature
 90.6941 or -182.4559 [ K or C]

 

Methane at normconditions, tnorm= 0oC,    pnorm= 1013.25 mbar:

density
 0.718 [ kg / m3 ]
isobar heat capacity cp
 2.181 [ kJ / (kg K) ]
isochor heat capacity cv
 1.657 [ kJ / (kg K) ]
speed of sound
 430.5 [ m / s ]

 


Released june 2007



Wikipedia ->Methane