Thermodynamics - work done by polytropic process (Problem 4-7)

From Book: Thermodynamics An Engineering Approach 8th edition.

Q4-7: A piston-cylinder device initially contains 0.07 m3 of nitrogen gas at 130 kPa and 1808C. 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.

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