chapter 3 section 2

Question 1

Why can the free energy change (ΔG) differ from the standard state value (ΔG°)?

Answer 1

Because actual concentrations of reactants and products often differ from 1 M

Question 1

Why is the standard state of 1 M H+ not useful in biochemistry?

Answer 1

Because it implies pH 0, which is not typical in biological systems.

Question 2

What modified standard state is used in biochemistry?

Answer 2

1 M for all solutes except protons, with pH fixed at 7

Question 3

How is this biochemical standard state denoted?

Answer 3

With a prime symbol: ΔG′, ΔH′, ΔS′, etc