Differences in (delta)G^o equations






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Shanzey
Posts: 120
Joined: Wed Sep 18, 2019 12:20 am

Differences in (delta)G^o equations

Postby Shanzey » Sun Feb 16, 2020 6:44 pm

How do we know when to use the lnQ equation or the lnK equation? Is it dependent on whether the system is in equilibrium or not?

PranaviKolla2B
Posts: 114
Joined: Fri Aug 30, 2019 12:17 am

Re: Differences in (delta)G^o equations

Postby PranaviKolla2B » Sun Feb 16, 2020 6:45 pm

K means that the system is in equilibrium and Q means that it is not.

Andrew Pfeiffer 2E
Posts: 101
Joined: Sat Sep 28, 2019 12:16 am

Re: Differences in (delta)G^o equations

Postby Andrew Pfeiffer 2E » Sun Feb 16, 2020 6:46 pm

As with equilibrium calculations, K is for when the reaction is at equilibrium, and Q (reaction quotient) is for non-equilibrium reactions.

Lauren Stack 1C
Posts: 100
Joined: Sat Aug 17, 2019 12:18 am

Re: Differences in (delta)G^o equations

Postby Lauren Stack 1C » Sun Feb 16, 2020 9:10 pm

lnQ is used when the system is not at equilibrium, while lnK is found at equilibrium. If you think about it, Q = K at equilibrium, so you can see the connection.


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