Determining Thermodynamic Stability through equilibrium compositions (textbook 5I.13) [ENDORSED]

[Sara Habibipour 1A]

Based on equilibrium compositions, how can you tell if a product is more stable? (ex: Cl2 vs F2)
If there's a larger equilibrium constant for the dissociation of these molecules, does that mean it's less stable?

[Chem_Mod]

Lets look at these equilibria:

F + F ----> F₂

Cl + Cl ----> Cl₂

Whichever one has the larger equilibrium constant, K, is more stable.

After I have discussed Gibbs free energy in class, we will see:

Delta G^o = -RT ln K

The larger the K value the more stable the product.