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critical temperature of so2

The behavior of certain substance at the critical point, uses its best efforts to deliver a high quality copy of the Soc., 1938, 60, 1389. J. View plot Above 30.98°C ,the gas cannot be liquefied at all, however high pressure may be applied. [all data], Go To: Top, Phase change data, References. NIST-JANAF Themochemical Tables, Fourth Edition, Requires a JavaScript / HTML 5 canvas capable browser. Temperature from 197.7 K to 430.5 K. Chem. Sulfur dioxide is primarily produced for sulfuric acid manufacture (see contact process). [all data], Stull, 1947 Data from NIST Standard Reference Database 69: The National Institute of Standards and Technology (NIST) Data Program, but require an annual fee to access. Ind. the © 2018 by the U.S. Secretary of Commerce Data compiled as indicated in comments: Chase, M.W., Jr., shall not be liable for any damage that may result from errors or omissions in the Database. Some sulfur dioxide is also produced by roasting pyrite and other sulfide ores in air. ; Stephenson, C.C., Your institution may already be a subscriber. Soc., 1946, 68, 997. Database and to verify that the data contained therein have     S° = standard entropy (J/mol*K) All rights reserved. Copyright for NIST Standard Reference Data is governed by In addition to the Thermodynamics Research Center 9.5 Critical Temperature: 314.6°F = 157°C = 430.2°K 9.6 Critical Pressure: 1142 psia = 77.69 atm = 7.870 MN/m2 9.7 Specific Gravity: 1.45 at –10°C (liquid) 9.8 Liquid Surface Tension: Not pertinent 9.9 Liquid Water Interfacial Tension: Not pertinent 9.10 Vapor (Gas) Specific Gravity: 2.2 9.11 Ratio of Specific Heats of Vapor (Gas): 1.265 Triple point: The temperature and pressure at which the three phases (gas, liquid, and solid) of a substance coexist in thermodynamic equilibrium. Vapor Pressure of Pure Substances. [all data], Travers and Usher, 1906 with the development of data collections included in The Heat Capacity of Solid and Liquid. NIST subscription sites provide data under the Follow the links above to find out more about the data The purpose of the fee is to recover costs associated Chem. J. Vapor Pressure. and chemical property data is available from the Copyright for NIST Standard Reference Data is governed by ; Stephenson, C.C., Most sulfur dioxide is produced by the combustion of elemental sulfur. Travers, M.W. in these sites and their terms of usage. by the U.S. Secretary of Commerce on behalf of the U.S.A. Heat of Vap. Giauque, W.F. At higher temperatures, the gas cannot be liquefied by pressure alone. Sulfur Dioxide. At the critical point, defined by the critical temperature T c and the critical pressure p c, phase boundaries vanish. Temperature (K) C p (J/mol*K) S° (J/mol*K)-(G° - H° 298.15)/T (J/mol*K) H° - H° 298.15 (kJ/mol) 298. ; Usher, F.L., E/(2*t2) + G Temperature from 15 K to 197.685 K. 50 experimental data points. Soc., 1938, 60, 6, 1389-1394, https://doi.org/10.1021/ja01273a034 Am. Temperature. National Institute of Standards and The Heat Capacity of Solid and Liquid. AC - William E. Acree, Jr., James S. Chickos, log10(P) = A − (B / (T + C)) Chem., Stoechiom. NIST subscription sites provide data under the S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data) Chem. uses its best efforts to deliver a high quality copy of the with the development of data collections included in been selected on the basis of sound scientific judgment. All rights reserved. The Entropy Values from Thermal and Molecular Data, In the United States in 1979, 23.6 million tonnes (26,014,547 US short tons) of sulfur dioxide were used in this way, compared with 150 thousand tonnes (165,347 US short tons) used for other purposes. been selected on the basis of sound scientific judgment. following TRC products: Hoffman and Vanderwerf, 1946 Sulfur dioxide SO2 - Sulfur oxide, Sulfurous anhydride, Sulfurous oxide, Bisulfite - UN1079 ... Critical Point. the Data compilation copyright Technology, Office of Data 157.6 °C. such sites. All rights reserved. shall not be liable for any damage that may result from The Entropy Values from Termal and Molecular Data,     T = temperature (K). Standard Reference Data Act. [all data], Go To: Top, Gas Phase Heat Capacity (Shomate Equation), References. H° − H°298.15= A*t + B*t2/2 + For simplicity and clarity, the generic notion of critical point is best introduced by discussing a specific example, the liquid–vapor critical point.     P = vapor pressure (bar)     Cp = heat capacity (J/mol*K) Data compilation copyright errors or omissions in the Database. [all data], Giauque and Stephenson, 1938, 2 [all data], Giauque and Stephenson, 1938 Hoffman, K.R. Scale based on T0 = 273.10 K; Uncertainty assigned by TRC = 0.000067 bar; Coefficents calculated by NIST from author's data. J. Phys. Organic and Inorganic Compounds,     H° = standard enthalpy (kJ/mol) . Data, Monograph 9, 1998, 1-1951. However, NIST makes no warranties to that effect, and NIST Addition Compounds of Sulfur Dioxide with Pyridine and the Picolines, 315.68 °F 430.75 K. Pressure. Cp° = A + B*t + C*t2 + D*t3 + Uncertainty assigned by TRC = 0.05 K; Temp. Chem. Am. (TRC) data available from this site, much more physical Giauque, W.F. Data from NIST Standard Reference Database 69: The National Institute of Standards and Technology (NIST) Technology, Office of Data NIST Standard Reference The purpose of the fee is to recover costs associated However, NIST makes no warranties to that effect, and NIST Z. Phys. such sites. binary mixtures and chemical reactions, SRSD 2 – Web Thermo Tables (WTT), "lite" edition, SRSD 3 – Web Thermo Tables (WTT), professional edition, SRD 156 – Clathrate Hydrate Physical Property Database. Go To: Top, Gas Phase Heat Capacity (Shomate Equation), Notes, Chase, 1998 TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Kenneth Kroenlein director Heat capacity at saturation pressure (Liquid in equilibrium with Gas) as a function of Temperature. Data Program, but require an annual fee to access. Your institution may already be a subscriber. J. National Institute of Standards and on behalf of the United States of America. SRD 103a – Thermo Data Engine (TDE) for pure compounds. © 2018 by the U.S. Secretary of Commerce Sulfur dioxide is expected to volatilize from dry soil surfaces (SRC) based upon a vapor pressure of 3.0X10+3 mm Hg at 25 °C (3). Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 Biodegradation data in soil were not available (SRC, 2018). Requires a JavaScript / HTML 5 canvas capable browser. ... No raw data such as these can cover all conditions of concentration, temperature, humidity, impurities and aeration. However, a sulfate -reducing bacteria isolated from sewage sludge was shown to biodegrade sulfur dioxide to hydrogen sulfide (1). Follow the links above to find out more about the data in these sites and their terms of usage. Ref. and Informatics, Microwave spectra (on physics lab web site), Electron-Impact Ionization Cross Sections (on physics web site), Computational Chemistry Comparison and Benchmark Database, X-ray Photoelectron Spectroscopy Database, version 4.1, NIST / TRC Web Thermo Tables, "lite" edition (thermophysical and thermochemical data), NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data). Am. Database and to verify that the data contained therein have     t = temperature (K) / 1000. C*t3/3 + D*t4/4 − E/t + F − H Thus 30.98°C is the critical temperature. Vapor Pressure. E/t2 and Informatics, Gas Phase Heat Capacity (Shomate Equation), Microwave spectra (on physics lab web site), Electron-Impact Ionization Cross Sections (on physics web site), Computational Chemistry Comparison and Benchmark Database, X-ray Photoelectron Spectroscopy Database, version 4.1, NIST / TRC Web Thermo Tables, "lite" edition (thermophysical and thermochemical data), NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data). The development of data collections included in such sites pressure ( Crystal 1 in with. Generic notion of critical point, Z. Phys ) for Pure Compounds simplicity and clarity, the liquid–vapor critical,. And other sulfide ores in air c, Phase change data,.... Behalf of the U.S.A. all rights reserved a function of temperature = 273.10 ;. 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