Is this transformation irreversible?

[Ahmed1029]

This is a cyclic transformation. Is it safe to say thay it's irreversible because if you reverse it, it means I could extract an amount of heat from a cold reservoir and move it into a hotter reservoir with no other effect?

 

[Chestermiller]

View attachment 316689
This is a cyclic transformation. Is it safe to say thay it's irreversible because if you reverse it, it means I could extract an amount of heat from a cold reservoir and move it into a hotter reservoir with no other effect?

No it's not safe to say that. This TS diagram doesn't say anything about the amount of work that's being done on or by the surroundings, or how the process is carried out. I can easily visualize a reversible process corresponding to this cycle.