For a sample of perfect gas when its pressure is changed isothermally from `p_(i)` to `p_(f)` , the entropy change is given by

For a sample of perfect gas when the pressure is changed isothermally from p_(i) to p_(f) the entropy change is given by-

For a sample of n mole of a perfect gas at constant temperature T (K) when its volume is changed from V_1 to V_2 the entropy change is given by

For a sample of n mole of a perfect gas at constant temperature T (K) when its volume is changed from V_1 to V_2 the entropy change is given by

The change in entropy when the pressure of perfect gas is changed isothermally from P_1 to P_2 is

The change in entropy when the pressure of perfect gas is changed isothermally from P_1 to P_2 is

4g of he gas is expanded isothermally at 300K from litre to 10L. The molar change in entropy is: