I want to know the answer to the following question:
What divides energy transformation into two kinds reversible processes and irreversible processes?
All the background I'm provided with is that "In processes where heat is generated, quantum states of lower energy, present as possible excitations in fields between atoms, act as a reservoir for part of the energy, from which it cannot be recovered, in order to be converted with 100% efficiency into other forms of energy.". Is that enough to answer the question?
Answer: no