Category 1D: Bioenergetics

Metabolism in other sets

What can thermodynamics NOT tell you

The rate of the reaction

What does ΔG tell you?

Whether a reaction is spontaneous or not

What is Keq?

The equilibrium constant

What does it mean when ΔG<0?

The reaction is spontaneous (exergonic)

What does it mean when ΔG>0?

The reaction is non-spontaneous (endergonic)

What does it mean if Keq>>1?

It means that products are favored at equilibrium

What does it mean if Keq<<1?

It means that the reactants are favored at equilibrium

What is the difference between ΔG° and ΔG

ΔG° is at standard conditions

ΔG is at actual conditions

What is Keq when ΔG°<0?

Keq>1 which means that products are favored at equilibrium

What is Keq when ΔG°>0?

Keq<1 which means that reactants are favored at equilibrium

What is the difference between Q and Keq

Keq tells you the ratio of products to reactants at equilibrium

Q tells you the ratio of products to reactants at the current state

When ΔG<0 then…

The reaction is spontaneous and

Q<Keq which means the reaction moves forward

When ΔG>0 then…

The reaction is nonspontaneous

Q>Keq which means the reaction moves in reverse direction

What si teh equation relating ΔG° to Keq?

ΔG° = -RTlnKeq