Entropy, Thermodynamics, Machine Learning.
contained in a system. It is always work done by a system, or heat absorbed by a system. Also, if state 1 <=>(equivalent to) state 2, i.e. we have a cycle, then DeltaE = 0 and therefore from the First Law of Thermodynamics equation, Qcycle = Wcycle. It is also useful to keep in mind the expansion