### K

Posted:

**Mon Mar 04, 2019 3:11 pm**When K is 0, <1, and >1, what is ∆G's sign??

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=141&t=43591

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Posted: **Mon Mar 04, 2019 3:11 pm**

When K is 0, <1, and >1, what is ∆G's sign??

Posted: **Mon Mar 04, 2019 3:12 pm**

K = 0 then delta G = 0

K < 1 then delta G > 0

K > 1 then delta G < 0

K < 1 then delta G > 0

K > 1 then delta G < 0

Posted: **Mon Mar 04, 2019 3:16 pm**

When delta G is zero the equation is at equilibrium so K=1.

Posted: **Mon Mar 04, 2019 5:32 pm**

This can be seen using ΔG = -RTlnK

When K>1, then lnK is positive, and ΔG is negative.

When K<1, then lnK is negative, and ΔG is positive.

When K>1, then lnK is positive, and ΔG is negative.

When K<1, then lnK is negative, and ΔG is positive.

Posted: **Tue Mar 05, 2019 1:52 pm**

Using the equation ΔG = -RTlnK.

ln 1=0 thus when K=1, ΔG = 0

ln 1=0 thus when K=1, ΔG = 0

Posted: **Tue Mar 05, 2019 1:55 pm**

K = 0 ; delta G = 0

K < 1 ; delta G > 0

K > 1 ; delta G < 0

K < 1 ; delta G > 0

K > 1 ; delta G < 0