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Gas properties Std enthalpy change of formation, ... Ethane vapor pressure vs. temperature. Uses formula ...
Ethane (US: / ˈ ɛ θ eɪ n / ETH-ayn, UK: / ˈ iː-/ EE-) is a naturally occurring organic chemical compound with chemical formula C 2 H 6. At standard temperature and pressure, ethane is a colorless, odorless gas. Like many hydrocarbons, ethane is isolated on an industrial scale from natural gas and as a petrochemical by-product of petroleum ...
A non-physical standard state is one whose properties are obtained by extrapolation from a physical state (for example, a solid superheated above the normal melting point, or an ideal gas at a condition where the real gas is non-ideal). Metastable liquids and solids are important because some substances can persist and be used in that state ...
On the other hand, some constants, such as K f (the freezing point depression constant, or cryoscopic constant), depend on the identity of a substance, and so may be considered to describe the state of a system, and therefore may be considered physical properties. "Specific" properties are expressed on a per mass basis.
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.
Liquid properties Std enthalpy change of formation, Δ f H o liquid: −277.38 kJ/mol Standard molar entropy, S o liquid: 159.9 J/(mol K) Enthalpy of combustion, Δ c H o: −1370.7 kJ/mol Heat capacity, c p: 112.4 J/(mol K) Gas properties Std enthalpy change of formation, Δ f H o gas: −235.3 kJ/mol Standard molar entropy, S o gas: 283 J ...
As quoted from this source in an online version of: J.A. Dean (ed), Lange's Handbook of Chemistry (15th Edition), McGraw-Hill, 1999; Section 4; Table 4.1, Electronic Configuration and Properties of the Elements Touloukian, Y. S., Thermophysical Properties of Matter, Vol. 12, Thermal Expansion, Plenum, New York, 1975.
Thermophysical Properties Research Center. Performing Organization: Purdue University. Controlling Organization: Defense Logistics Agency. Documented summaries from numerous scientific journals, etc. and critical estimates. 17000 pages in 13 volumes. Aluminium nitride: 170 [37]-175 [42]-190 [42] 293 [42] 1 × 10 ^ −11 [42] Aluminium oxide