On Jun 7, 2017 10:06 AM, "Jed Rothwell" <jedrothw...@gmail.com> wrote: > > H LV <hveeder...@gmail.com> wrote: > >> >> Joule's apparatus used a spindle with paddles which was turned by a falling weight outside the calorimeter. The motion of the falling weight did not result in the generation of potential energy. > > > That was a different experiment. I was referring to one in which he wound a spring inside a calorimeter. > > - Jed >
The passage you cite mentions that Joule is concerned that when a spring is wound it does not produce heat. If a gas behaved like a spring in addition to heating up when compressed then it would be incorrect to infer the heat energy of the gas from its temperature. Harry
