23: Entropy and Gibbs Free Energy

Chapter 23 Reflection

I have learnt the following ideas:

1. Reviewed the definition of entropy.

2. Reactions are spontaneous when delta G is negative, non-spontaneous when delta G is positive, at that given temperature.

3. Gibbs Free Energy = Enthalpy change of reaction -T(delta S)

4. Reviewed the use of quadrants.

5. When delta H (+) and delta S (-), the reaction is not spontaneous.

6. When delta H (-) and delta S (+), the reaction is spontaneous.

7. When both delta H and delta S are negative, the reaction is spontaneous at low temperatures. Else, when both are positive it is spontaneous at high temperatures.