If it were also measured at a pressure of 28 atmospheres, arsenic's boiling point would be higher than its melting point, as you would expect. At 28 times standard atmospheric pressure, arsenic melts at a temperature of 1090 K. In order to form liquid arsenic, the atmospheric pressure must be increased. "When heated at standard atmospheric pressure, arsenic changes directly from a solid to a gas, or sublimates, at a temperature of 887 K. *Note, however, this complication: Most, but not all, of these measurements were done at standard pressure (1 bar). Phys., 1976, 65, 1371-1373.Here I'm assuming you are interested in comparing the magnitude of $\Delta S^$$ The heat capacity of saturated liquid ethane from the boiling point to the critical temperature and heat fusion of the solid, Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Data, 1963, 8, 3, 371-381, Ĭalorimetric study of the phase changes in solid ethane,Ĭhem. Std entropy change of fusion, fus S o J/(molK) Std enthalpy change of vaporization, vap H o: 24.545 kJ/mol Std entropy change of vaporization, vap S o J/(molK) Solid properties Std enthalpy change of formation, f H o solid: 103.85 kJ/mol Standard molar entropy, S o solid J/(mol K) Heat capacity, c p J/(mol K) Liquid. Heat of Siblimation of Molecular Crystals: A Catalog of Molecular Structure Increments., THE VAPOR PRESSURE OF ETHANE NEAR THE NORMAL BOILING POINT 1, Handbook on vapor pressure and heats of vaporization of hydrocarbons and related compounds, R. Vapor pressure of normal paraffins ethane through n-decane from their triple points to about 10 mm mercury, Handbook of the Thermodynamics of Organic Compounds, 1987, The heat of fusion and the heat of vaporization, The heat capacity of ethane from 15°K to the boiling point. Įnthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. Methane, Ethane, Propane, Isobutane, and Normal Butane, The Heat of Fusion of Organic Compounds.,īull. Miscibility and Compatibility of Some Liquid and Solidified Gases at Low Temperature, SRD 156 – Clathrate Hydrate Physical Property Database SRSD 3 – Web Thermo Tables (WTT), professional edition SRSD 2 – Web Thermo Tables (WTT), "lite" edition SRD 103b – Thermo Data Engine (TDE) for pure compounds, SRD 103a – Thermo Data Engine (TDE) for pure compounds. (TRC) data available from this site, much more physicalĪnd chemical property data is available from the In addition to the Thermodynamics Research Center Requires a JavaScript / HTML 5 canvas capable browser.Ĭoefficents calculated by NIST from author's data.Įnthalpy of phase transition ΔH trs (kJ/mol)Įntropy of phase transition ΔS trs (J/mol*K) Uncertainty assigned by TRC = 5.×10 -9 bar TRCĪverage of 41 out of 46 values Individual data pointsĪverage of 28 out of 29 values Individual data pointsĪverage of 6 values Individual data pointsĪverage of 19 values Individual data pointsĮnthalpy of vaporization (at saturation pressure) ChickosĪverage of 23 values Individual data pointsĪverage of 10 values Individual data points TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny directorĪC - William E. Secretary of Commerce on behalf of the U.S.A.ĭH - Eugene S. Your institution may already be a subscriber.įollow the links above to find out more about the dataīy the U.S. With the development of data collections included in The purpose of the fee is to recover costs associated NIST subscription sites provide data under theĭata Program, but require an annual fee to access.
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