Good explanation http://www.entropylaw.com/entropyenergy.html
Complete with this great diagram of Joule's experiment to demonstrate conservation of energy
Something that strikes me as quite interesting here. Given that it's impossible to produce a perfectly efficient process for converting energy from one form to another. Conservation of energy is impossible to observe or demonstrate.
- If we don't have confirming observations of the theory, this theory could never have arrived by induction from observation
- If we can't have empirically observe it, it's impossible to make falsifying observations, hence falsificationism is out (or CoE isn't a scientific hypothesis)
See also :