Chapter 5: Bioenergetics Flashcards
What energy is available to be used by the system?
free energy
Energy that is not available to be used by the system.
Entropy
Difference between the initial amount of free energy in a system and the final amount of free energy in a system.
Change in free energy
What name is associated with bioenergetics?
Joseph Willard Gibbs
The initial state of a chemical system
reactants
The final state of a chemical system
products
What kind of reaction is spontaneous and has an inherent tendency to take place?
Exergoinc
What kind of reaction is not spontaneous and does not have an inherent tendency to take place?
Endergonic
If delta G of a reaction is negative then delta G of the reverse reaction is _______
positive
If delta G=0 then the chemical system is already in ________ and no ___ reaction is occurring.
equilibrium; net
The total free energy change of the _______ depends only on the difference between the initial Gi and final Gf and not on the path taken.
pathway
Does Delta G provide information about the rate of reaction?
No
“energy barrier” measure of the stability of the system
Energy activation (Ea)
equilibrium constant that = [products]/[reactants]
Keq
What can you couple with an endergonic reaction to drive it by making the net, coupled reaction spontaneous?
ATP hydrolysis
