- #1

Hamiltonian

- 296

- 190

in the mathematical expression of the first law of thermodynamics, I do not understand the significance of W or the net work done on the system. shouldn't simply be ΔU = Q, if Q is the net heat transfer into the system.

Clearly I am missing something very important hear but all the sources that I have referred to so far just mention the above expression and don't exactly explain W so is this something so obvious that isn't worth explicitly explaining?