## delta G knot

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

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

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

Samantha Chung 4I
Posts: 77
Joined: Wed Oct 03, 2018 12:16 am

### delta G knot

What is the difference between delta G knot and delta G?

michelle
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

### Re: delta G knot

Like the concept in enthalpy. Delta G knot is the change in G under standard conditions (1 atm or 1 M). Delta G can be the change of free energy of the whole process(reaction).

Xinyi Zeng 4C
Posts: 63
Joined: Fri Sep 28, 2018 12:18 am

### Re: delta G knot

Just to add on, delta G (without knot) is calculated from delta H - T * delta S, while delta G knot is calculated from delta H knot - T * delta S knot. You can use delta G's equation to predict the effect of temperature and feasibility of a reaction, sometimes by just knowing the signs of delta H and delta S for any reaction, not under standard conditions

katie_sutton1B
Posts: 61
Joined: Fri Sep 28, 2018 12:17 am

### Re: delta G knot

delta G knot indicates standard conditions, while regular delta G is the change in free energy under other conditions

Sophia_Kiessling_2L
Posts: 61
Joined: Fri Sep 28, 2018 12:26 am

### Re: delta G knot

g knot is the g value under standard conditions

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