equation explanation






Moderators: Chem_Mod, Chem_Admin

Jane Burgan 1C
Posts: 73
Joined: Fri Sep 28, 2018 12:15 am

equation explanation

Postby Jane Burgan 1C » Thu Feb 21, 2019 12:46 pm

Hi can someone explain the equation G = deltaG^0 + RTlnQ? I'm not sure where the RTlnQ is coming from.

ThomasLai1D
Posts: 61
Joined: Fri Sep 28, 2018 12:17 am

Re: equation explanation

Postby ThomasLai1D » Thu Feb 21, 2019 2:09 pm

RTlnQ is derived from the deltaG^0 = -RTlnK. K represents the system in the standard state at equilibrium, so if you want to find deltaG not at equilibrium, you must use Q in the equation and subtract it from -RTlnK.

PranitKumaran1F
Posts: 30
Joined: Thu Nov 08, 2018 12:17 am

Re: equation explanation

Postby PranitKumaran1F » Thu Feb 21, 2019 3:09 pm

deltaG^0 refers to the Gibbs free energy of a reaction in equilibrium, but RTlnQ is used to find the Gibbs free energy of a reaction that is not in equilibrium, which can be shown through the fact that the Q of a reaction is the ratio of products to reactants for reactions that may or may not be in equilibrium.


Return to “Gibbs Free Energy Concepts and Calculations”

Who is online

Users browsing this forum: No registered users and 2 guests