Isochoric = Irreversible?

[Janet Nguy 2C]

So my understanding of the different work equations is this:

for a system at constant pressure, i.e. isochoric process.
for a reversible process not at constant pressure.

So does isochoric necessarily mean that the system is undergoing an irreversible expansion/compression? Or am I missing something?

[Janet Nguy 2C]

Typo, sorry! i meant Isobaric.

[Rachel Yu 1G]

Isochoric would technically use the equation w=PdeltaV, however since isochoric implies a constant volume, then deltaV = 0 and work = 0. I believe most isochoric reactions are irreversible unless stated otherwise.