A spontaneous state refers to when processes occur naturally without needing an external force or energy input.
Topic 9.5: 9.5 Free Energy and Equilibrium
Spontaneous State cheat sheet for homework
These are processes that do not occur naturally and require some form of external energy input for them to happen.
This law states that systems will naturally progress towards states with higher entropy or disorder – essentially describing why certain states are 'spontaneous'.
The minimum amount of energy required for a non-spontaneous process/reaction to occur.