Drawing a PV Diagram for 3 Processes: Help Needed!

[Abidal]

Hello everyone,
I was asked in a physics exam to draw a pv digram that consists of 3 process as below:
1) isothermal expansion
2)Isobaric compression
3)Adiabatic compression

whenever I try to draw it I come up with a really untidy diagram so can anyone help please !

 

[Mandeep Deka]

To draw any diagram in physics:
1.Formulate the equations that relate the variables, which will eventually be your co-ordinate axes (i mean Pressure and Volume in this case)
2. Then try to relate the equation obtained with any standard mathematical equation whose graph is know.
3. If you don't find any standard mathematical equation whose graph is know to you, there are certain steps to be followed to draw a rough sketch of the graph.

 

[gneill]

Do a google images search on "PV diagram". Browse, pick a format that you like. More importantly, pick a format that your instructor will like!