8/19/2019 CH4 Properties

1/1

CH4 

Methane

CAS Number : 74-82-8

UN1971 (gas); UN1972 (liquid refrigerated)

Gas PropertiesMolecular Weight← Molecular weight : 16.043 g/mol

Solid phase← Melting point : -182.5 °C

← atent heat o! !u"ion #1$013 %ar$ at triple point& : 58.68 '(/'g

Liquid phase← i)ui* *en"it+ #1.013 %ar at %oiling point& : 422.62 'g/m3 

← i)ui*/ga" e)ui,alent #1.013 %ar an* 15 °C #5 °&& : 630 ,ol/,ol

← oiling point #1.013 %ar& : -161.6 °C

← atent heat o! ,aporiation #1.013 %ar at %oiling point& : 510 '(/'g

Critical point← Critical temperature : -82. °C

← Critical pre""ure : 45.6 %ar 

Gaseous phase← a" *en"it+ #1.013 %ar at %oiling point& : 1.81 'g/m3 

← a" *en"it+ #1.013 %ar an* 15 °C #5 °&& : 0.68 'g/m3 

← Compre""i%ilit+ actor #& #1.013 %ar an* 15 °C #5 °&& : 0.8

← peci!ic gra,it+ #air 1& #1.013 %ar an* 21 °C #0 °&& : 0.55

← peci!ic ,olume #1.013 %ar an* 21 °C #0 °&& : 1.48 m3/'g

← eat capacit+ at con"tant pre""ure #Cp& #1 %ar an* 25 °C # °&& : 0.035 '(/#mol.7&

← eat capacit+ at con"tant ,olume #C,& #1 %ar an* 25 °C # °&& : 0.02 '(/#mol.7&

← atio o! "peci!ic heat" #amma:Cp/C,& #1 %ar an* 25 °C # °&& : 1.305454

← 9i"co"it+ #1.013 %ar an* 0 °C #32 °&& : 0.000102 oi"e

← ;hermal con*ucti,it+ #1.013 %ar an* 0 °C #32 °&& : 32.81 m