equilibrium constant


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equilibrium constant

[‚ē·kwə′lib·rē·əm ‚kän·stənt]
(chemistry)
A constant at a given temperature such that when a reversible chemical reaction cC + bB = gG + hH has reached equilibrium, the value of this constant K 0 is equal to where aG , aH , aC , and aB represent chemical activities of the species G, H, C, and B at equilibrium.
References in periodicals archive ?
In the general case it is necessary to know four equilibrium constants, whereas in the simplest case, of [alpha][K.
The application of the Gibbs-Duhem equation (Guggenheim 1967) on Eqn 4 allows the derivation of equations that enable the calculations of the thermodynamic equilibrium constant and the activity coefficients of adsorbed ions.
The selectivity sequence K > Ca > Mg was established from equilibrium constant values reported for binary equilibria in Table 6.
The thermodynamci functions of the mixture, such as the Gibbs free energy, and the solvent-solvent and polymer-solvent specific interactions, respectively, as well as the preferential adsorption coefficients in the polymer/solvent/solvent system with specific hydrogen bonding interactions are discussed by means of association equilibrium constants, according to Eq.
Replacement of the n-butyl group by isopropyl in the Grignard reagent increases the equilibrium constant by a factor of two in accordance of increasing hindrance to coordination with the donor.
The equilibrium constant for the reaction given below is estimated to be log [Beta] ~ -3.
In their study of blends of poly(2,3-dimethylbutadiene-co-4-vinylphenol) with different poly(ethylene-co-vinyl acetate), Coleman and Painter [15, 16] calculated the standard interassociation equilibrium constant and showed that the accessibility of the interacting species increases until it reaches a level off with an increase of the spacing between both the vinyl phenol and vinyl acetate interacting groups in the copolymers.
This apparent equilibrium constant is related to the true thermodynamic equilibrium constant, [K.
The negative logarithm of the equilibrium constant K measures the difference of acidities of the acids [HA.
n]" is an equilibrium constant whose value depends upon the heat of formation of the associated species and the temperature.
eq,a] is the equilibrium constant of the esterification reaction of AA with BD (Equation (1)).

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