Gibbs Free Energy and Spontaneity
The first video looks at the Intuition behind why spontaneity is driven by enthalpy, entropy and temperature. The second video provides an example to determine if a reaction is spontaneous by calculating the change in Gibbs free energy. The third video provides a more formal understanding of why a negative change in Gibbs free energy implies a spontaneous, irreversible reaction. The fourth video looks at why the "proof" of the relation between changes in Gibbs free energy and Spontaneity is wrong in many textbooks.

For more information on Gibbs free energy visit Revision Science.