The standard Gibbs free energy for the hydrolysis of ATP to ADP is -31 kJmol-1 . What is the Gibbs energy of reaction in an environment at 37 \deg C in which the ATP, ADP, and Pi concentrations are (a) 1.0 mmol dm-3 and (b) 1.0 mmol dm-3 ?
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4.14 The standard Gibbs energy for the hydrolysis of ATP to ADP is -31 kJ mol⁻¹. What is the Gibbs energy of reaction in an environment at 37°C in which the ATP, ADP, and Pᵢ concentrations are all (a) 1.0 mmol dm⁻³ and (b) 1.0 μmol dm⁻³? 4.18 The standard biological reaction Gibbs energy for the removal of the phosphate group from adenosine monophosphate is −14 kJ mol⁻¹ at 298 K. What is the value of the thermodynamic standard reaction Gibbs energy? 4.21 Under biochemical standard conditions, aerobic respiration produces approximately 38 molecules of ATP per molecule of glucose that is completely oxidized. (a) What is the percentage efficiency of aerobic respiration under biochemical standard conditions? (b) The following conditions are more likely to be observed in a living cell: pᴃ₂ = 53 mbar, p₂ = 132 mbar, [glucose] = 5.6 × 10⁻² mol dm⁻³, [ATP] = [ADP] = [Pᵢ] = 1.0 × 10⁻⁴ mol dm⁻³, pH = 7.4, T = 310 K. Assuming that activities can be replaced by the numerical values of molar concentrations, calculate the efficiency of aerobic respiration under these physiological conditions.
Sri K.
The standard Gibbs free energy for the hydrolysis of ATP to ADP for the reaction ATP ⇌ ADP + Pi is ΔGº = -31 kJ mol⁻¹ at 37°C. In a typical bacterial cell, [ATP], [ADP] and [Pi] is 8 mmol dm⁻³, 1 mmol dm⁻³, and 8 mmol dm⁻³ respectively. What is the value of ΔG in kJ/mol? For the reaction: G6P ⇌ F6P ΔGº = +1.7 kJ/mol at 298 K. What is equilibrium composition of the mixture if initially 1mM of G6P is present?
Adi S.
The standard Gibbs energy change for the hydrolysis of ATP is −30.5 kJmol−1. In a particular cell, the concentrations of ATP , ADP, and Pi are 0.0026 molL−1 , 0.0062 molL−1 , and 0.0063 molL−1, respectively. Calculate the Gibbs energy change for the hydrolysis of ATP under these conditions. (Assume a temperature of 298 K)
Supreeta N.
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