The amount of energy that an electron has normally is best referred to as its

Spontaneity tell us the direction of the reaction, but not how fast it goes. gibbs free energy brings together enthalpy, entropy and temperature in one easy formula. g = h - ts. and, finally the sign of delta g is always negative for a spontaneous reaction.

The teacher is mostly talking about the distillation of a mixture

High-energy and unstable.

Iam not going to tell you