I want to know the answer to the following question:
A reversible process is one in which this does not happen.
All the background I'm provided with is that "In this case, the energy must partly stay as heat, and cannot be completely recovered as usable energy, except at the price of an increase in some other kind of heat-like increase in disorder in quantum states, in the universe (such as an expansion of matter, or a randomisation in a crystal).". Is that enough to answer the question?
Answer: no