Standard Gibbs free energy

The equilibrium eonstant K is related to the Gibbs standard free energy ehange AG by... [Pg.425]

If two reactions differ in maximum work by a certain amount 8wm (= -SAG ), it follows from the Brpnsted relation [when taking into account the Arrhenius equation and the known relation between the equilibrium constant and the Gibbs standard free energy of reaction, A m = exp(-AGm/J r)] that their activation energies will differ by a fraction of this work, with the opposite sign ... [Pg.241]

It is worthwhile to compare the stability differences of the analogous hydrindanes and decalins. In both cases, the Gibbs standard free energy differences favor the trans isomers, by 1.3 kJ mol" in the hydrindanes and by about 10 kJ mol in the decalins (94MI3). This direction of the difference is in contrast with that found for the 1,3-heteroanalogs of cis- and trans-hydrindane. [Pg.399]

The Gibbs equation relates the change in a reaction s Gibbs standard free energy (AG°) to its equilibrium constant ... [Pg.304]

Chemical composition and Gibbs standard free energy of formation of Fe(II)-Fe(III) hy-droxysulphate green rust and Fe(II) hydroxide. Clay Miner. 34 499-510... [Pg.619]

As the Gibbs standard free energy for the peptide-nonpolar ligand interaction decreases, and AGassoci becomes increasingly negative, enhanced retention will occur. The relationship between the relative retention of a specific peptide in a RPC separation process carried out at constant pressure, P, and constant molar volume, V, can thus be expressed in terms of the following well-known, fundamental thermodynamic relationship ... [Pg.566]

The problem is that the energy change that correlates with Keq is not AH0 but AG° (the so-called Gibbs standard free energy )5, and if we know AG°, we can calculate Km by the equation... [Pg.84]

The racemisations terminated in equilibria in which one component was in excess over the other with equihbrium constants different for the two chiral media. From the temperature dependence of the equilibrium constants they found the differences of heat contents [AH =. Q and 1.8 kj mol i) and Gibbs standard free energies (dG°=0.30 and 0.34 kJ mol-i) respectively for bromocamphorsulphonate and cinchomium ions as the added chiral species. [Pg.11]

The Gibbs standard free-energy change (AG° and an entropy (AS°) component ... [Pg.128]

Gibbs standard free energy change (AGe) The mathematical function of temperature that governs a reaction equilibrium. [Pg.509]

The gas-phase acidity of a compound AH is defined as the variation of the Gibbs standard free energy (AG°) of the reaction... [Pg.426]

It is important to realize that from the adsorption equilibrium data (i.e., the experimental isotherm), generally it cannot be distinguished between the effects of surface heterogeneity and lateral interactions. Consider the adsorption equilibrium constant K it can be related to the Gibbs standard free energy of adsorption ... [Pg.94]

As far as the thermodynamics of the interaction of a protein or peptide species i with the nonpolar stationary phase of an RPC or HIC sorbent is concerned, retention is associated with a decrease in the Gibbs standard free energy (AG soc,). Because the equilibrium distribution coefficient, ATassoc,i> related to the overall energy change in Gibbs free energy, i.e.. [Pg.144]

The relationship (Equation 4.3) that correlates energy change with equilibrium constant involves standard enthalpy (AH°), temperature (K), and standard entropy (AS°) and is called the Gibbs standard free energy (AG°) ... [Pg.127]

The Gibbs standard free energy change is related to two other thermodynamic quantities the change in enthalpy, AH°, and the change in entropy, A5 . [Pg.51]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...