Need help regarding finding out the max pressure in a isothermal cycle.

[cochrad]

A volume of 1.5 m3 of air initially at 1.31 bar and 293k undergoes three processes in order to complete a cycle:

Process
1 to 2 Isothermal compression from state 1 through a volumetric compression ratio of Rv to state 2
2 to 3 Isobaric heating back to the original volume.
3 to 1 Isochoric cooling back to state1.

How do i find the max pressure in the cycle?

Thanks

 

[mgb_phys]

By knowing what the three iso... words mean.
You don't need any of the numbers or any equations - you just have to understand what the gas is doing.

 

[cochrad]

i know what the three iso's mean. could you supply a little more help please

 

[mgb_phys]

You need to know that PV/T = constant

Isothermal compression

The gas is compressed but at the same temperature so pressure does up.

Isobaric heating back to the original volume.

Isobaric means no change in pressure.

Isochoric cooling back to state1.

Volume is constant but cooled so pressure goes down.