1
Q
dU = δQ + δW
A
dU is the infinitesimal change in internal energy
δQ is the infinitesimal heat or thermal energy
δW is the infinitesimal work
2
Q
dU is an
A
exact differential
3
Q
δQ and δW
A
are inexact differentials
4
Q
inexact differentials often relate to
A
irreversible processes
5
Q
δQ = 0
A
is an adiabatic process
6
Q
quasistatic process
A
a series of infinitesimal equilibrium states/changes
7
Q
δW =
A
-PdV
8
Q
recipproal theorem
A
(dx/dy)z = (dy/dx)^-1 z
9
Q
reciprocity theorem
A
(dx/dy)z (dy/dz)x (dz/dx)y = -1
10
Q
the chain rule of differentiation
A
(dx/dz)g = (dx/dy)g (dy/dz)g
11
Q
definition of a non-natural derivative
A
take a derivative with respect to a variable and keep another variable fixed, which is not one of the natural derivatives
Thermal Physics
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