A piston cylinder contains 0.1 kg air at 300 K and 100 kPa. The air is now slowly compressed in an isothermal (constant temperature) process to a final pressure of 250 kPa. Air is assumed as ideal gas; the gas constant of air is R = 0.287 kJ/kg-K .
1) Find the work in the process.
2) What is the change in the internal energy of the air?
3) Find the heat transfer in the process.
4) Is heat transferred into or out of the air?