2. A piston-cylinder device initially contains 0.08 m³ of

nitrogen gas at 150 kPa and 200°C. The nitrogen is

now expanded to a pressure of 80 kPa polytropically

with a polytropic exponent whose value is equal to

the specific heat ratio (called isentropic expansion).

Determine the final temperature and the boundary

work done during this process. [MO1]