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Enthalpy and equilibrium constant

Isoperibol titration calorimetry was also extensively used by Drago s group [215] to determine enthalpies and equilibrium constants of a variety of reactions where acid-base adducts are formed. These results are the source of Drago s ECW model, which has been widely used to rationalize chemical reactivity [216-218]. [Pg.166]

SC (simultaneous correction) method. The MESH equations are reduced to a set of N(2C +1) nonlinear equations in the mass flow rates of liquid components ltJ and vapor components and the temperatures 2J. The enthalpies and equilibrium constants Kg are determined by the primary variables lijt vtj, and Tf. The nonlinear equations are solved by the Newton-Raphson method. A convergence criterion is made up of deviations from material, equilibrium, and enthalpy balances simultaneously, and corrections for the next iterations are made automatically. The method is applicable to distillation, absorption and stripping in single and multiple columns. The calculation flowsketch is in Figure 13.19. A brief description of the method also will be given. The availability of computer programs in the open literature was cited earlier in this section. [Pg.408]

Box 7. When r3>e3, corrections to the lrp vip and Ts are calculated from the nonlinear MEH equations by the Newton-Raphson method. In these equations the enthalpies and equilibrium constants usually are nonlinear functions of the temperatures. [Pg.410]

SC (simultaneous correction) method. The MESH equations are reduced to a set of A(2C + 1) nonlinear equations in the mass flow rates of liquid components ly and vapor components Vij and the temperatures 7. The enthalpies and equilibrium constants Ky are determined by the primary variables lij, Vij, and Tj. The nonlinear equations are solved by the... [Pg.432]

The assumed D structure has 14 vibrational frequencies of the type ZA, Ag, SBg, E, Ag, Bg, Bj, and 3E. The frequencies were estimated by comparison with (BeO) and cyclobutane from Rathjens, Freeman, Gwlnn, and Pitzer (2). The estimated structure and frequencies gave an entropy which was in excellent agreement with the experimental enthalpy and equilibrium constant determined by Chupka, et al. (J ). [Pg.418]

Many researchers have studied the thermodynamic equilibrium of the reactions occurring in the gasification process. The reaction enthalpies and equilibrium constants of some reactions at different gasification temperature are listed in Table 4.5. [Pg.170]

Specific interactions in binary blends of ethylene-vinyl acetate copolymer with various low molecular weight terpene-phenol tackifying resins (TPR) were systematically investigated, as a function of the composition of the blend and of the electron acceptor ability of the resin, by using attenuated total reflection FTIR spectroscopy. Molecular acid-base were evidenced between TPR hydroxyl groups and EVA carbonyl groups. Quantitative information on the fraction of acid-base bonded entities, the enthalpy and equilibrium constant of pair formation were obtained. A crystalline transition of the EVA copolymer was observed and discussed in terms of enthalpy and entropy considerations based on FTIR and calorimetric DSC investigations. Fundamental results are then summarised to predict the interfacial reactivity of such polymer blends towards acid or basic substrates. 16 refs. [Pg.82]

Table 13.2 Standard enthalpies and equilibrium constants of representative HDT reactions. Table 13.2 Standard enthalpies and equilibrium constants of representative HDT reactions.
Standard Enthalpies and Equilibrium Constants of Representative HDT Reactions... [Pg.229]


See other pages where Enthalpy and equilibrium constant is mentioned: [Pg.410]    [Pg.969]    [Pg.969]    [Pg.410]    [Pg.435]    [Pg.410]    [Pg.419]    [Pg.420]    [Pg.410]    [Pg.367]    [Pg.211]    [Pg.21]    [Pg.30]   
See also in sourсe #XX -- [ Pg.96 , Pg.97 ]




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And equilibrium constant

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