reversible expansion

[nshahwan 1L]

Could someone explain how the small change is made to reverse a process? Like I understand a very small part of a variable is changed (like pressure) but how would that be done?

[Niharika 1H]

A process is reversible if an extremely small change can reverse it. For example, an extremely small increase in pressure can move an object into a container, while an extremely small decrease in pressure can push the object out. No change in pressure won't move the object.

[Petrina Kan 2I]

This small change in parameter or pressure can be done using a piston.

[005162520]

How can we calculate a reversible expansion?

[Natalie Benitez 1E]

How would we know on the exam if something is reversible or irreversible ?

[nshahwan 1L]

Thanks for the replies. Also I think they will tell us if it is reversible but I am not sure. For example if it is isothermic should we assume it to be reversible?

[Nare Nazaryan 1F]

How would we know on the exam if something is reversible or irreversible ?

I believe it is reversible if the pressure is not constant and if the internal and external pressure are the same.