## Free energy

$\Delta G^{\circ}= \Delta H^{\circ} - T \Delta S^{\circ}$

$\Delta G^{\circ}= -RT\ln K$

$\Delta G^{\circ}= \sum \Delta G_{f}^{\circ}(products) - \sum \Delta G_{f}^{\circ}(reactants)$

Dina 2k
Posts: 57
Joined: Wed Sep 18, 2019 12:17 am

### Free energy

what is the relationship between standard free energy and free energy change?

005391550
Posts: 103
Joined: Thu Jul 25, 2019 12:15 am

### Re: Free energy

i think it is deltaG = standard G + RTlnQ

ELu 1J
Posts: 51
Joined: Thu Jul 25, 2019 12:16 am

### Re: Free energy

Standard free energy is measured in a lab under standard conditions (usually is denoted with a degree symbol). Delta G can be measured in a situation that isn't in standard conditions like in a biological system.

Viviana Velasquez
Posts: 97
Joined: Sat Jul 20, 2019 12:15 am

### Re: Free energy

I think the standard free energy conditions is the one measured in the lab and the regular free energy change occurs in real life systems

KBELTRAMI_1E
Posts: 108
Joined: Sat Jul 20, 2019 12:17 am

### Re: Free energy

ELu 1J wrote:Standard free energy is measured in a lab under standard conditions (usually is denoted with a degree symbol). Delta G can be measured in a situation that isn't in standard conditions like in a biological system.

So would we need to know anything more than just the sources of error/ comparison between these?

ELu 1J
Posts: 51
Joined: Thu Jul 25, 2019 12:16 am

### Re: Free energy

KBELTRAMI_1E wrote:
ELu 1J wrote:Standard free energy is measured in a lab under standard conditions (usually is denoted with a degree symbol). Delta G can be measured in a situation that isn't in standard conditions like in a biological system.

So would we need to know anything more than just the sources of error/ comparison between these?

Probably not, since we haven't learned that equation yet but the equation relating the two are delta G = delta G not + RTlnQ if that helps.

KBELTRAMI_1E
Posts: 108
Joined: Sat Jul 20, 2019 12:17 am

### Re: Free energy

ELu 1J wrote:
KBELTRAMI_1E wrote:
ELu 1J wrote:Standard free energy is measured in a lab under standard conditions (usually is denoted with a degree symbol). Delta G can be measured in a situation that isn't in standard conditions like in a biological system.

So would we need to know anything more than just the sources of error/ comparison between these?

Probably not, since we haven't learned that equation yet but the equation relating the two are delta G = delta G not + RTlnQ if that helps.

thank you!