It is the first law of thermodynamics for a very small change in the state of the system.
It is in Heat thermodynamics and statistical physics by Brij Lal, Dr. N. Subrahmanyam, and P.S. Hemne.
Asked
Active
Viewed 354 times
0
-
Possible duplicates: https://physics.stackexchange.com/q/36150/2451 , https://physics.stackexchange.com/q/65724/2451 , https://physics.stackexchange.com/q/153791/2451 and links therein. – Qmechanic Aug 09 '19 at 14:36
-
For a differential change in state, irrespective of how extensive or tortuous the path between the two neighboring end points, dU is always the same; but delta W and delta Q can vary extensively with path as long as their difference for the various paths is overall the same. – Chet Miller Aug 09 '19 at 15:32