## Equilibrium Constant

Lindsey Chheng 1E
Posts: 85
Joined: Fri Aug 30, 2019 12:16 am

### Equilibrium Constant

What did Lavelle say was the reason that there are no units for K?

Michelle N - 2C
Posts: 94
Joined: Wed Sep 18, 2019 12:19 am

### Re: Equilibrium Constant

I remembered something like this: Technically, we should be calculating based on the activity of the reactant/product. However, throughout what we learn here, we assume that the activity is the same as the reactant/product.

There was definitely more that he went in depth with, but I wasn't able to catch it..

MAC 4G
Posts: 102
Joined: Wed Sep 18, 2019 12:16 am

### Re: Equilibrium Constant

K doesn't have any units because we are using activity values. He used the example of finding Gibbs free energy change or ΔG0 = −RTln(K). I don't quite remember what the units are but I'm sure you can look them up and I believe we'll be covering this later on in the course. But in relation to the question, the resulting units of ΔG0 are based on the units for R and T, so if K had units we wouldn't get the proper units for ΔG0.

Maya Beal Dis 1D
Posts: 87
Joined: Sat Aug 17, 2019 12:16 am
Been upvoted: 2 times

### Re: Equilibrium Constant

What is the difference between the reaction quotient and the equilibrium constant?

BNgo_2L
Posts: 80
Joined: Wed Sep 11, 2019 12:17 am

### Re: Equilibrium Constant

The reaction quotient demonstrates the relative amounts of reactants and products at any given particular time whereas the equilibrium constant demonstrates the favored direction of the reaction when the forward and reverse reaction rates are at equilibrium.