
The Second and Third Laws 71
laws of thermodynamics can not be dependent on any particular temperature scale.
In fact, the first law, in its purest formulation
¯
dQ = dU + dW, does not even refer to
temperature explicitly! The second law, in whatever form one chooses to consider,
does however involve temperature explicitly.
But as explained in the section (1.1), a change of temperature scale, of whatever
complexity, is like a change of coordinates, and perfect differentials transform quite
unambiguously under such transformations, leaving the basic relations between per-
fect differentials unaltered. All this really means is that all the thermodynamic ...