# Are slow isobaric processes necessarily reversible?

All isothermal and adiabatic processes are reversible when carried out very slowly.

Is it true for the isobaric process too? As isobaric process can also be carried out very slowly.

• Carrying out the operation slowly is part of what is typically required. But, the absence of kinetic friction is also necessary. And in some cases, like acceleration of a rigid body without friction, the operation does not have to be carried out very slowly (i.e., as long as no dissipative forces are involved). Jun 29, 2019 at 12:37

$$P = \frac{nRT}{V}$$