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## Homework Statement

Air is contained in a vertical cylinder fitted with a frictionless piston and a set of stops. The cross sectional area of the piston is 0.05m^2. The air, which is initially at 0.21 MPa and 430 C, is cooled as result of heat transfer to the surroundings. Assuming that during the decrease in volume PV=constant find (a) the temperature of the air inside the cylinder when the piston reaches the stops and (b) the pressure inside the cylinder if cooling continues until the temperature is 70 C. Assume the air behaves as an ideal gas with constant specific heat with k=1.4

The piston is 1.2m in length, stops are placed halfway of the piston, dividing the piston in two parts of 0.6m.

**The attempt at a solution**

Cant understand where to start