Define the Reversible process.

A gaseous sample is generally allowed to do only expansion // compression type work against its surroundings The work done in case of an irreversible expansion ( in the intermediate stages of expansion // compression the states of gases are not defined). The work done can be calculated using dw= -P_(ext)dV while in case of reversible process the work done can be calculated using dw= -PdV where P is pressure of gas at some intermediate stages. Like for an isothermal reversible process. Since P=(nRT)/(V) , so w=intdW= - underset(v_(i))overset(v_(f))int(nRT)/(V).dV= -nRT ln(V_(f)/(V_(i))) Since dw= PdV so magnitude of work done can also be calculated by calculating the area under the PV curve of the reversible process in PV diagram. If four identical samples of an ideal gas initially at similar state (P_(0),V_(0),T_(0)) are allowed to expand to double their volumes by four different process. I: by isothermal irreversible process II: by reversible process having equation P^(2)V= constant III. by reversible adiabatic process IV. by irreversible adiabatic expansion against constant external pressure. Then, in the graph shown in the final state is represented by four different points then, the correct match can be

Which of the following is incorrect for isothermal reversible process

If DeltaS_("total") is positive the process is ..... and occurs in the ..... as mentioned. The reverse process is .......

For the reversible process, the value of DeltaS is given by the expression:

For the reversible process, the value of DeltaS is given by the expression:

Assertion:- Reversible process and a cyclic process are the same type of processes. Reason:- DeltaH_("cylic") and DeltaE_("cylic") are zero.

Calculate work done during isothermal reversible process when 5 mol ideal gas is expanded so that its volume is doubled at 400K .