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Re: [Phys-L] let's define energy



-- "heat", where there are at least four long-established
and widely-used meanings, each of which has some merit
but also some serious problems. (Not to mention various
vernacular and/or metaphorical usages.)


http://www.av8n.com/physics/thermo/heat.html#sec-def-heat

I used to thing that heat definition is a process quantity,

if you have an internal energy function for all system states.

if you have an adiabatic path connecting (a least in one way) all two states

if you have work defined for that path

if you have work defined for another path between that two states, then you
can speak about heat in taht process

I do not recognize that definition among your four ones (you do not need to
know about T or dS to use that definition).

I am wrong?, This kinds of system are very special?


(See for example Weinreich, Fundamental Thermodynamics, p23)
--
Diego Saravia
Diego.Saravia@gmail.com
NO FUNCIONA->dsa@unsa.edu.ar