We’re being asked to determine the equilibrium constant (K) at 15 ˚C for the first reaction.
Recall that ΔG˚rxn and K are related to each other:
Firefly luciferase is the enzyme that allows fireflies to illuminate their abdomens. Because this light generation is an ATP-requiring reaction, firefly luciferase can be used to test for the presence of ATP. In this way, luciferase can test for the presence of life. The coupled reactions are
If the overall ΔG° of the coupled reaction is –7.70 kJ/mol, what is the equilibrium constant, K, of the first reactions at 15°C? The ΔG° for the hydrolysis of ATP to AMP is −31.6 kJ/mol.
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Gibbs Free Energy concept. You can view video lessons to learn Gibbs Free Energy. Or if you need more Gibbs Free Energy practice, you can also practice Gibbs Free Energy practice problems.