Nitrogen dioxide thermodynamic data

Flame Temperature. The adiabatic flame temperature, or theoretical flame temperature, is the maximum temperature attained by the products when the reaction goes to completion and the heat fiberated during the reaction is used to raise the temperature of the products. Flame temperatures, as a function of the equivalence ratio, are usually calculated from thermodynamic data when a fuel is burned adiabaticaHy with air. To calculate the adiabatic flame temperature (AFT) without dissociation, for lean to stoichiometric mixtures, complete combustion is assumed. This implies that the products of combustion contain only carbon dioxide, water, nitrogen, oxygen, and sulfur dioxide. 

In this problem, we compare the temperature dependence of the specific heat of triatomic ideal gases based on statistical thermodynamics and classical/empirical polynomials. Locate the appropriate molecular data for carbon dioxide (CO2) and nitrogen dioxide (NO2) that will allow you to compute and graph the specific heat at constant pressure Cp for both gases from 300 to 800 K at atmospheric pressure. The graphs that are generated should be based on calculations from statistical thermodynamics. 

Dye fixation on modified celluloses depended on the pH, temperature, time of thermofixation, type and concentration of the dye used. Diffusion data have been obtained for helium, nitrogen, oxygen, and carbon dioxide gases through membranes of the acetate derivative of cellulose. The thermodynamic data have been evaluated and the mechanism of diffusion was discussed. 

The thermodynamic data of carbon dioxide and other fluids are compiled in International Thermodynamic Tables of the Fluid State published by the International Union of Pure and Applied Chemistry (lUPAC) [28] in the form of tables and equations of state. Thermodynamic data and equations of state are also provided by Journal of Physical and Chemical Reference Data for argon [29], nitrogen [29], oxygen [29], carbon dioxide [30], methane [31], ethane [31], propane [31], butane [31, 32], isobutene [31, 32], ethylene [29] and methanol [33]. Fluid Phase Equilibria , Journal of Supercritical Fluids and Chemical Engineering Science are also good sources of thermodynamic and thermochemical data of SCFs. Data for phase diagrams. 

Recently, in the Thermodynamic Data Center of Moscow Power Institute, a database on thermodynamic properties of gaseous and vapor-liquid binary mixtures was created on the basis of results of experimental investigations carried out in this institute. Freons of the methane series, carbon dioxide and sulphur hexafluoride are the first component of these mixtures, with nitrogen, hydrogen and helium as the second component. The corresponding software product was developed for the information system (Baibuz 1990). 

Calculate AjH for this reaction by using the thermodynamic data in Appendix D. Use your AfH° value, plus data from Table 10.3, to estimate the nitrogen-oxygen bond energy in NO2. [Hint The structure of nitrogen dioxide, NO2, is best represented as a resonance hybrid of two equivalent Lewis structures.] 100. A reaction involved in the sequence of reactions leading to the destruction of ozone is... 

To illustrate this thermodynamic consistency test, Figs. 15, 16, and 17 show plots of the appropriate functions needed to calculate Areas I, II, and III, respectively, for the nitrogen-carbon dioxide system at 0°C the data are taken from Muirbrook (M5). Fugacity coffiecients were calculated with the modified Redlich-Kwong equation (R4). 

The basic philosophy of the approach presented here for ethane is to make use of the best available experimental data and theory to produce accurate, consistent and theoretically sound representations of transport properties over the widest range of thermodynamic states possible. So far, the transport properties of three polyatomic fluids, nitrogen (see Section 14.2), carbon dioxide (Vesovic et al. 1990) and ethane (Hendl et al. 1994 Vesovic et al. 1994), have been correlated in such a fashion. 

Early investigatioiis of the photochemistry of a-heteroatom substituted carboxylates 40 (Scheme 19) concentrated on the operation of SET processes. These substances possess two potential electron donor sites. SET from the carboxylate moiety leads to formation of an acyloxy radical 41 while SET from the heteroatom center gives rise to a zwitterionic radical 42. Subsequent loss of carbon dioxide from either of these intermediates yields the same carbon-centered, heteroatom-stabilized radical 43. The critical factors determining which of these pathways is responsible for the SET-promoted decarboxylation reactions of substrates in this family is (1) the relative oxidation potentials of the two potential donor moieties and (2) the relative rates of decarboxylation of intermediates 41 and 42. Redox potential data indicate that electron transfer from sulfur (E(-t) = ca. 0.4 V) and nitrogen (E(-l-) = ca. 0.7 V) centers to acceptors should be thermodynamically more favorable than from carboxylate groups (E(-t) = ca. 1.4 V). 

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