Work Done By A Gas

A gas is taken through the cycle as shown in the figure. What is the total amount of work done by the gas?

An ideal gas is compressed to half its initial volume using several processes. Which of the processes results in the maximum work done on the gas?
1. adiabatic
2. isobaric
3. isochoric
4. isothermal

A thermodynamic system is taken through the cycle The work done by the gas along the path is:

1.		2.
3.		4.	zero

Two gases and are filled at the same pressure in separate cylinders with movable pistons of radius and respectively. On supplying an equal amount of heat to both the systems reversibly under constant pressure, the pistons of gas and are displaced by and respectively. If the change in their internal energy is the same, then the ratio is equal to:

1.		2.
3.		4.