Calculation of standard formation properties of species from standard transformed formation properties of reactants in biochemical reactions at specified pH

Article Abstract:

Research was conducted to examine the calculations for standard transformed formation properties of biochemical reactants at a specified pH using the values of Delta-(sub f)G degree and Delta-(sub f)H degree species that make them up. A Legendre transform was used to derive the equations to define a transformed Gibbs energy G'. Results show the importance of considering the inverse Legendre transform that defines the Gibbs energy G in terms of the transformed Gibbs energy G'.

Gibbs' free energy

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Effect of temperature on standard transformed Gibbs energies of formation of reactants at specified pH and ionic strength and apparent equilibrium constants of biochemical reactions

Article Abstract:

The estimation of standard transformed Gibbs energies of formation of reactants, standard transformed Gibbs energies of reaction, and apparent equilibrium constants K' of biochemical reactions at specified pH and ionic strength are presented. Gibbs energy of spices is expressed by a quadratic in temperature; it is possible to estimate the standard transformed properties of reactants and reactions at any temperature.

Usage, Observations, Gibbs' equation

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Effect of temperature on the standard transformed thermodynamic properties of biochemical reactions with emphasis on the Maxwell equations

Article Abstract:

It is shown that when the standard transformed Gibbs energy (deltafG') of formation of a reactant in an enzyme-catalyzed reaction can be expressed as a function of temperature, pH, and ionic strength. The calculations presented are based on the assumption that the heat capacities of species are equal to zero at zero ionic strength.

Analysis, Maxwell equations

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