`1` mole of gas occupying `3` litre volume is expanded against a constant external pressure of `1` atm to a volume of `15` litre. The work done by the system is:

1 mole of a gas occupying 3 L volume is expanded against a constant external pressure of 5 atm to a volume of 15 L. The work done by the system is __________ .

1 mole of a gas occupying 3 L volume is expanded against a constant external pressure of 5 atm to a volume of 15 L. The work done by the system is __________ .

If one mole of a gas occupying y L volume is expanded against a constant external pressure of one atmosphere to a volume of x L, the work done by the system is ______.

If one mole of a gas occupying y L volume is expanded against a constant external pressure of one atmosphere to a volume of x L, the work done by the system is ______.

One mole of a gas occupying 3dm^(3) expands against a constant external pressure of 1 atm to a volume of 13 lit. The workdone is :-

One mole of a gas occupying 3dm^(3) expands against a constant external pressure of 1 atm to a volume of 13 lit. The workdone is :-

One mole of a gas occupying 3 dm^3 expands against constant external pressure of 1 atm to a volume of 13 dm^3. The work done is: