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The following table lists the Van der Waals constants (from the Van der Waals equation) for a number of common gases and volatile liquids. [ 1 ] To convert from L 2 b a r / m o l 2 {\displaystyle \mathrm {L^{2}bar/mol^{2}} } to L 2 k P a / m o l 2 {\displaystyle \mathrm {L^{2}kPa/mol^{2}} } , multiply by 100.
Ethane is only very sparingly soluble in water. The bond parameters of ethane have been measured to high precision by microwave spectroscopy and electron diffraction: r C−C = 1.528(3) Å, r C−H = 1.088(5) Å, and ∠CCH = 111.6(5)° by microwave and r C−C = 1.524(3) Å, r C−H = 1.089(5) Å, and ∠CCH = 111.9(5)° by electron ...
Gas properties Std enthalpy change ... Table data obtained from CRC Handbook of Chemistry and Physics 44th ed. Ethane vapor pressure vs. temperature.
Note that the especially high molar values, as for paraffin, gasoline, water and ammonia, result from calculating specific heats in terms of moles of molecules. If specific heat is expressed per mole of atoms for these substances, none of the constant-volume values exceed, to any large extent, the theoretical Dulong–Petit limit of 25 J⋅mol ...
The Mollier enthalpy–entropy diagram for water and steam. The "dryness fraction", x , gives the fraction by mass of gaseous water in the wet region, the remainder being droplets of liquid. An enthalpy–entropy chart , also known as the H – S chart or Mollier diagram , plots the total heat against entropy, [ 1 ] describing the enthalpy of a ...
A starting point for the development can be taken as the virial equation of state for a gas. P V = R T + B P + C P 2 + D P 3 … {\displaystyle PV=RT+BP+CP^{2}+DP^{3}\dots } where P {\displaystyle P} is the pressure, V {\displaystyle V} is the volume, T {\displaystyle T} is the temperature and B , C , D {\displaystyle B,C,D} ... are known as ...
The term bond-dissociation energy is similar to the related notion of bond-dissociation enthalpy (or bond enthalpy), which is sometimes used interchangeably.However, some authors make the distinction that the bond-dissociation energy (D 0) refers to the enthalpy change at 0 K, while the term bond-dissociation enthalpy is used for the enthalpy change at 298 K (unambiguously denoted DH° 298).
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).