The First Law of Thermodynamics
The
change in internal energy 
U
of a system is equal to the heat that flows into the system Q
minus the work W done by the system on its surroundings;
U
= Q - W; this is known as the First Law of
Thermodynamics.
The
First Law of Thermodynamics is a restatement of the Work-Energy
Theorem and the ideas of Conservation of
Energy.
Example:
Example:
 |
|
|
 |
|
|
|
||
|
|
|||