Infinitesimal example sentences

A process or change is said to be reversible, if a change is brought out in such a way that the process could, at any moment, be reversed by an infinitesimal change.Under reversible process, we can put pex = p for infinitesimal changes in the volume making wrev = – p d .If the pressure is not constant but changes during the process such that it is always infinitesimally greater than the pressure of the gas, then, at each stage of compression, the volume decreases by an infinitesimal amount, d .