I am greatly confused with the following things
- Work done in reversible and irreversible process
Here: Since first law is only the energy conservation, if you have a gas, closed with a movable piston ( no friction ) , the work done in reversible or irreversible is the product of external pressure times the change in volume, irrespective of reversibility. Because this way, you also consider how external elements are changing the gas. Is this true ?
- Given a process, how exactly would you say whether it reversible, irreversible or quasi-static or not ? Say for example, if it given that due to constant external pressure the gas is compressed rapidly, how exactly would you classify into the above classes ?