Laws Of Thermodynamics
First law
The first law of thermodynamics is an expression of the conservation of energy. It states that energy can be transformed from one form to another, but cannot be created or destroyed.

Second Law
The second law of thermodynamics states that heat can flow from a higher temperature body to a cooler body, but not vice versa. An example of this is the heat sinks of a computer. Some of the energy from flowing electricity in a computer is transformed into heat. This heat is transferred to the heat sinks so it can be dissipated. In this picture the heat sinks are the large grey fins below the fan.
external image heatsink.jpg
Pictue from
Third Law
The third law states that the third law states that as the measure of the unavailability of a system’s energy to do work in most pure substances approaches zero as the absolute temperature approaches zero. This law provides an absolute reference point for the determination of unavailability of system’s energy to work.

The first two laws of thermodynamics have a great application in the career field because they state the rules for how heat will act. This is useful when trying to create energy because some of it can be lost as heat.