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Gas properties Std enthalpy change of formation, Δ f H o gas –124.7 kJ/mol Standard molar entropy, S o gas: 310.23 J/(mol K) Enthalpy of combustion, Δ c H o –2877.5 kJ/mol Heat capacity, c p: 98.49 J/(mol K) at 25 °C n-butane van der Waals' constants [3] a = 1466.2 L 2 kPa/mol 2 b = 0.1226 liter per mole
The density of butane is highly dependent on temperature and pressure in the reservoir. [19] For example, the density of liquid butane is 571.8±1 kg/m 3 (for pressures up to 2 MPa and temperature 27±0.2 °C), while the density of liquid butane is 625.5±0.7 kg/m 3 (for pressures up to 2 MPa and temperature −13±0.2 °C).
This is an extended version of the energy density table from the main Energy density page: Energy densities table ... Natural uranium (0.7% U235) in light-water ...
LPG is composed mainly of propane and butane, while natural gas is composed of the lighter methane and ethane. LPG, vaporised and at atmospheric pressure, has a higher calorific value (46 MJ/m 3 equivalent to 12.8 kWh/m 3) than natural gas (methane) (38 MJ/m 3 equivalent to 10.6 kWh/m 3), which means that LPG cannot simply be substituted for ...
In contrast, wet natural gas also contains significant portions of other liquids such as ethane, propane or butane (also known as Natural Gas Liquids). Wet natural gas is used for petrochemicals as well as gasoline (petrol). In 2023, the United States has led the world in both natural gas production and natural gas exports.
Butane: C 4 H 10: 0 −140 58 106-97-8 2,2-Difluoropropane: CH 3 CF 2 CH 3: 0 −104.8 80 420-45-1 Perfluoroisobutane: C 4 F 10: 0 238 354-92-7 Nitrosyl bromide: NOBr 0 −56 110 13444-87-6 Xenon tetroxide: XeO 4: 0 dec −35.9 195 12340-14-6 Trifluoromethylsulfonyl hypofluorite [84] CF 3 SO 2 OF 0 −87 168 Trifluoromethyl chloroformate [85 ...
The Wobbe index is expressed in MJ/Nm³ (where 'Nm³' indicates'm³ in Normal conditions), or sometimes in BTU/scf.In the case of natural gas (molar mass 17 g/mol), the typical heating value is around 39 MJ/Nm³ (1,050 BTU/scf) and the specific gravity is approximately 0.59, giving a typical Wobbe index of 51 MJ/Nm³ (1,367 BTU/scf).
The heating value depends on the source of gas that is used and the process that is used to liquefy the gas. The range of heating value can span ±10 to 15 percent. A typical value of the higher heating value of LNG is approximately 50 MJ/kg or 21,500 BTU/lb. [2] A typical value of the lower heating value of LNG is 45 MJ/kg or 19,350 BTU/lb.