A cylinder containing 0.5kg of air and a moveable piston is submerged in an ice-water bath (shown in the sketch below). The air in the cylinder is initially in equilibrium with the bath temperature. The piston is very quickly (adiabatically) pushed down from position 1 to position 2 compressing the air to 2/3 of its original volume. The piston is held at A cylinder containing 0.5kg of air and a moveable piston is submerged in an ice-water bath (shown in the sketch below). The air in the cylinder is initially in equilibrium with the bath temperature. The piston is very quickly (adiabatically) pushed down from position 1 to position 2 compressing the air to 2/3 of its original volume. The piston is held at position 2 until the air is again in equilibrium with the bath temperature. Finally, the piston is very slowly raised back to position 1