Module 1 Gibbs Free Energy

Question 1

What is Gibbs Free Energy equation

Answer 1

G0 = H-T(S)

Question 2

Standard Free Energy Change

Answer 2

G = G0 + RTlnK

Question 3

Conditions for spontaneous reaction

Answer 3

G < 0

Question 4

Conditions to make an unfavourable reaction, favourable

Answer 4

Remove products, add reactants, couple with favourable reaction - to make products/reactions < 1

Question 5

When in equilibrium,

Answer 5

G0 = -RTlnK

Question 6

When in standard conditions

Answer 6

G0 = G

Question 7

Standard conditions with respect to enzymes

Answer 7

[Mg2+] = 1mM
[H+] = 10^-7

Question 8

Why does ATP have such high energy

Answer 8

Exergonic reaction releases energy from the weak phosphoanhydride bonds through hydrolysis
Phosphate ion also in resonance structure which makes it very stable

Question 9

Define exergonic reaction

Answer 9

Products are in lower energy state (more stable) than reactants - release energy and favourable

Question 10

Define endergonic reaction

Answer 10

Reactants in lower energy state - absorb energy and unfavourable