Isothermal or adiabatic process

[moust]

i was reading my lecture note over the half term but i am still a bit confused and i was wondering if someone could describe in detail, using a p-v diagram, a well known engineering cycle which specifies a isothermal or adiabatic process.

Thanks you very much

 

[Gokul43201]

Have you tried to understand what happens in an ideal 4-stroke IC engine?

 

[Q_Goest]

Consider a simple refrigeration process. What are the four basic steps in the process and how can you model them?

Note: One of the four steps can be isenthalpic as well as adiabatic. Which one is it?