A gas is enclosed in a cylinder with a freely movable piston. The load on the piston is gradually decreased. The temperature of the gas can be changed by placing the cylinder in hot and cold heat reservoirs. The figure shown P-Vgraph of such a cylinder. What intermediate can be drawn the nature of change in the temperature of the gas ? " "

A gas is enclosed in a cylinder with a freely movable piston. The load

1.	A gas is enclosed in a cylinder with a freely movable piston. The load on the piston is gradually decreased. The temperature of the gas can be changed by placing the cylinder in hot and cold heat reservoirs. The figure shown P-Vgraph of such a cylinder. What intermediate can be drawn the nature of change in the temperature of the gas ? " "
Answer» SOLUTION :We draw two isotherms representing constant TEMPERATURES `T_(1)` and `T_(2)`sucn that `T_(2)`passes through initial and final points 1 and 2 and `T_(1)`passes through certain intermediate POINT 3 . The curve closer to ORIGIN re[resents LOWER temperaturature. Hence the gas is heated in the section 1-3 and cooled in the section 1-2.