Hydrogen sulfide thermodynamic properties

Table 2. Physical and Thermodynamic Properties of Hydrogen Sulfide...

Chemical Properties. Although hydrogen sulfide is thermodynamically stable, it can dissociate at very high temperatures. The decomposition thermodynamics and kinetics have been reviewed and the equihbrium constant for the reaction has been deterrnined (101,102) ... 

Anhydrous copper(II) sulfate, 7 773 Anhydrous ethanol, production by azeotropic extraction, 8 809, 817 Anhydrous gaseous hydrogen sulfide, 23 633 Anhydrous hydrazine, 13 562, 585 acid-base reactions of, 13 567-568 explosive limits of, 13 566t formation of, 13 579 vapor pressures of, 13 564 Anhydrous hydrogen chloride, 13 809-813 physical and thermodynamic properties of, 13 809-813 purification of, 13 824-825 reactions of, 13 818-821 uses for, 13 833-834... 

Liquid hydrazine, 13 586 Liquid hydrocarbons, in fluidized-bed processes, 20 169-170 Liquid hydrogen delivery of, 13 853 energy density of, 13 839 physical and thermodynamic properties of, 13 762-763t as a rocket fuel, 13 800 storage of, 13 785-786 Liquid hydrogen sulfide, 23 630, 633 Liquid hydrogen tank levitation system, 23 866... 

Finding Work of Compression with a Thermodynamic Chart Hydrogen sulfide is to be compressed from 100°F and atmospheric pressure to SOpsig. The isentropic efficiency is 0.70. A pressure-enthalpy chart is taken from Starling (Fluid Thermodynamic Properties for Light Petroleum Systems, Gulf, Houston, TX, 1973). The work and the complete thermodynamic conditions for the process will be found. 

Until recently the ability to predict the vapor-liquid equilibrium of electrolyte systems was limited and only empirical or approximate methods using experimental data, such as that by Van Krevelen (7) for the ammonia-hydrogen sulfide-water system, were used to design sour water strippers. Recently several advances in the prediction and correlation of thermodynamic properties of electrolyte systems have been published by Pitzer (5), Meissner (4), and Bromley ). Edwards, Newman, and Prausnitz (2) established a similar framework for weak electrolyte systems. 

Goodwin (1983) reviewed the thermodynamic properties of hydrogen sulfide. Using an advanced equation of state a table of properties was constructed over a wide range of pressures and temperatures. 

TABLE 2-226 Thermodynamic Properties of Hydrogen Sulfide Concluded)... 

Sage, B. H., and W. N. Lacey Some Properties of the Lighter Hydrocarbons, Hydrogen Sulfide, and Carbon Dioxide, American Petroleum Institute, New York, 1955. Sage, B. H., and W. N. Lacey Thermodynamic Properties of the Lighter Paraffin Hydrocarbons and Nitrogen, American Petroleum Institute, New York, 1950. Stull, D. R., and G. C. Sinke Thermodynamic Properties of the Elements, American Chemical Society, Advances in Chemistry 1957. 

Carbon acids are relatively soft. Owing to the electron-withdrawing property of alkyl groups attached to a 57 -hybridized carbon (16), the hardness sequence of several carbenium ions follows the order Ph > Bu > z-Pr > Et > Me . This sequence is supported by thermodynamic data deduced from the reactions of alcohols with hydrogen sulfide. The validity of the above sequence need not be restricted to free cations, but it implies that the more carbenium character a center attains during a reaction, the harder it will be. The increasing stability of isomeric butanols n < iso < sec < tert) parallels the trend of hardness exhibited by the carbenium ion R which combines with the hard hydroxide ion. This offers an explanation for isomerizations such as... 

FIGURE 9.7 Experimental (symbols) and fitted (lines) results for Henry s constants (H21) for Hydrogen sulfide (2) in water (1) from Equation 9.37 through Equation 9.41. (Reprinted with permission from A. Plyasunov, J. P. O Connell, R. H. Wood, and E. L. Shock, 2000, Infinite Dilution Partial Molar Properties of Aqueous Solutions of Nonelectrolytes. II. Equations for the Standard Thermodynamic Functions of Hydration of Volatile Nonelectrolytes over Wide Ranges of Conditions Including Subcritical Temperatures, Geochimica Et Cosmochimica Acta, 64, 2779, With permission from Elsevier.)... 

---