Question

For the reaction A + B ó C + D

Assume that the standard change in free energy has a positive value.

Changing the conditions of the reaction can alter the value of ΔG.

=> Choose TRUE or FALSE for the following statement:

Increasing [C] and [D] will decrease ΔG

Pyruvic acid has a pKa of 2.5. Its conjugate base is pyruvate. Which form, the acid or the base, dominates at pH 7.4?

		neither
		Pyruvate
		Pyruvic acid
		Both For the reaction A + B ó C + D Assume that the standard change in free energy has a positive value. Changing the conditions of the reaction can alter the value of ΔG. => Choose TRUE or FALSE for the statement below: Adding a catalyst will affect ΔG For the reaction A + B ó C + D Assume that the standard change in free energy has a positive value. Changing the conditions of the reaction can alter the value of ΔG. => Choose TRUE or FALSE for the statement below: Increasing [A] and [B] will decrease ΔG For the reaction A + B ó C + D Assume that the standard change in free energy has a positive value. Changing the conditions of the reaction can alter the value of ΔG. => Choose TRUE or FALSE for the following statement: Coupling with ATP hydrolysis will decrease ΔG Note (explain your answers )

Answer 1

given statement is false. by changing concentration deltag will not change.

pH = 7.4 means basic in nature so pyruvate is dominant.

Adding a catalyst will affect ΔG false

Increasing [A] and [B] will decrease ΔG false

no . Coupling with ATP hydrolysis will decrease ΔG

usually, Gibbs free energies, reaction enthalpies and reaction entropies are defined as molar quantities - so changing concentrations will not influence the thermodynamic parameters.