2nd and 3rd law

Measures the amount of disorder in a system.

Related to the 2nd law

 $\Delta S=\frac{Q}{T}$  

Adding Heat increases entropy

Removing heat decreases entropy

It is impossible to lower an objects temperature to absolute Zero

Temperature in Kelvin

1st law- you cant get something from nothing. More work can be done than heat energy inputed but you can break even

2nd law- more restrictive- cant break even some heat inputed will be lost

3rd law- nothing can be cooled to absolute zero. This is why we cannot have total energy efficiency