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My quibble is that JD states that the structure of the usual form of the...
first law can not handle all five cases. I hope to show that it can handle
all five cases by explicit construction. (usual structure = Delta E = W +Q
)
For the sake of definiteness, lets stipulate 10 units of energy is
transfered from A to B.
3)Energy could leave A in thermal form and arrive at B in nonthermal form....
Delta E = 10
Q = 10
W = 0
By explicit construction the structure of the usual statement has
accomodated all five cases.
I hope its clear that the following is at least consistent.
"Energy could leave A in nonthermal form" --> that is W
"Energy could leave A in thermal form" --> that is Q
> It is bad practice to have Q mean one thing on Monday and
> another thing on
> Tuesday.
I have not done that!
And we don't bother to distinguish the form of arrival in B as we lump it
all together and call it Delta E.