Hydrogen chloride thermodynamic properties

Anhydrous Hydrogen Chloride. Anhydrous hydrogen chloride is a colorless gas that condenses to a colorless liquid and freezes to a white crystalline solid. The physical and thermodynamic properties of HCl are summarized in Table 2 for selected temperatures and pressures. Figure 1 shows the temperature dependence of some of these properties. 

Table 2. Physical and Thermodynamic Properties of Anhydrous Hydrogen Chloride...

The increasing ranges of pressure and temperature of interest to technology for an ever-increasing number of substances would necessitate additional tables in this subsection as well as in the subsec tion Thermodynamic Properties. Space restrictions preclude this. Hence, in the present revision, an attempt was made to update the fluid-compressibihty tables for selected fluids and to omit tables for other fluids. The reader is thus referred to the fourth edition for tables on miscellaneous gases at 0°C, acetylene, ammonia, ethane, ethylene, hydrogen-nitrogen mixtures, and methyl chloride. The reader is also... 

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... 

The work with which we are chiefly concerned here is an extension of these investigations of the effects of water on the thermodynamic properties of electrolytes in DPA solvents. The electrolytes considered are acids (HA), whose importance as a class of electrolytes derives from their involvement in many chemical reactions, either as reactants or as catalysts. In conjunction with these investigations, a parallel study was carried out water was replaced by diethyl ether (Et20) to determine the extent to which the hydrogen bond donor properties of the water molecule affect the interactions between HA, H20, and the solvent. For comparison, some additional experiments were included that used as electrolytes a lithium salt and a chloride salt and H2S instead of H20. 

In case that the energy of a molecule can be represented as the sum of several terms (such as rotational, vibrational, electronic, and translational energy), the Boltzmann factor can be written as the product of individual Boltzmann factors, and the contributions of the various energy terms to the total energy of the system in thermodynamic equilibrium and to the heat capacity, entropy, and other properties can be calculated separately. To illustrate this we shall discuss the contributions of rotational and vibrational motion to the energy content, heat capacity, and entropy of hydrogen chloride gas. 

Thermodynamic properties of liquid mixtures of hydrogen chloride and tetraQuorometheine Fluid Phase Equilib. 1985,22,89-105... 

The following data, taken from the National Bureau of Standards compilation. Selected Values of Chemical Thermodynamic Properties gives the standard enthalpy of formation of hydrogen chloride from its elements at 25 °C in kg cal mol (Thus the difference between the first and third results gives the heat of dissolving 1 mol of HCl gas in 2 mol of water.) Show that the partial molar enthalpy of hydrogen chloride in a 10 mol dm solution, relative to the elements, is —36.26 kg cal mol , and that the partial molar enthalpy of water in the same solution, relative to pure liquid water, is —0.43 kg cal mol. ... 

---