1. Thermodynamics Playlist Intro

Thermodynamics considers the internal energy of an object which is given the symbol U, we also go on to explore how heat engines work and their representation on p-V diagrams.

 

2. 1st Law of thermodynamics

The first law of thermodynamics states that the heat energy supplied to a system is equal to the increase in the internal energy of the system plus the work done by the system on its surroundings.

 

3. Isothermal Changes

Isothermal changes, as the name suggests, occur at a constant temperature. You should also recall that for an ideal gas we can say that pV = nRT.

 

4. Adiabatic Changes

You will have felt the effects of adiabatic processes every time you spray on deodorant and it feels cold on your skin, the reverse is also true when a gas is compressed and it heats up.

 

5. Constant Pressure and Volume changes

This is actually quite straight forward when you see these processes on a p-V diagram, and I also show the adiabatic and isothermal changes on the same diagram.

 

6. Work Done by a Gas

As a gas expands it does work, since a force is moving a distance. Using this knowledge we come up with a formula for work (for a constant pressure) or can estimate the work by looking at the area under a curve on a p-V diagram.