Bioenergetics Flashcards

1
Q

What is the First Law of Thermodynamics?

A

Energy can neither be created nor destroyed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What sign does an exothermic reaction have?

For enthalpy

A

Negative

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the Second Law of Thermodynamics?

A

Universe always tends towards increasing disorder-Entropy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What makes a spontaneous chemical reaction

A

Delta G= Delta H (enthalpy)-T X delta S (entropy)

Gibbs Free Energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What type of reaction is endergonic?

A

One where the products free energy is more than the reactants

Does not occur spontaneously

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Delta G naught (standard change in free energy)

A

Energy change when reactants and products are at a conc. of 1mol/L-useful in comparing the energy changes from different reactions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Negative Delta G

A
  1. Exergonic
  2. Spontaneously
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Positive Delta G

A
  1. Endergonic
  2. Not spontaneous
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Delta G is zero

A

Reaction is at equilibrium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Are delta G pathways additive?

A

Yes-as long as the sum of delta G of the individual reactions are negative

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Keq >1

A

Forward direction: Negative #

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Keq <1

A

Reverse, positive #

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Keq=1

A

Equilibrium, G=0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly