I'm interested in the method that heat energy changes at an individual level. We can measure the heat output of an internal combustion engine, but how do the changes occur? I'm sure there is a chemical answer to this, but what would be the answer if we sum all individual atoms energies?
Maybe...
Thermodynamics deal with quantum mechanics all the time, so I wondered what role it played in a internal combustion engine. Could we calculate it and how does it affect the engine's final output?