# Relationship between free energy and the equilibrium constant

1. Nov 19, 2006

### chazgurl4life

The relationship between free energy and the equilibrium constant is

Go = -RT ln K

By measuring the pH at various temperatures, the Kb for NH3(aq) was found to be temperature dependent, yielding the following values:

temperature (K) Kb
283 1.34 X 10-5
293 1.42 X 10-5
303 1.50 X 10-5

Over moderate temperature ranges (ranges less than 100 K degrees) both deltaSo and deltaHo can be considered approximately temperature independent. By plotting the available information appropriately, obtain estimates for deltaSo and delayHo for the reaction:

ok so i figured out that my y=mx+b equation should loook lik:

lnKb=delta H/R(gas constnt) - delta S/r

bbut what is my x axis and y axis?

2. Nov 19, 2006

### Gokul43201

Staff Emeritus
1. This question belongs in the Coursework & Homework section of the forums. Henceforth, please post such questions there (and use a more descriptive title).

2.
That's not right. What is the relationship between $\Delta G_0~,~~\Delta H_0$ and $\Delta S_0$ ?

Last edited: Nov 19, 2006