Question 7 20 pts 2 kg of air in a piston-cylinder is initially at 462 kPa and 650 K. The air expands in a polytropic pr

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Question 7 20 Pts 2 Kg Of Air In A Piston Cylinder Is Initially At 462 Kpa And 650 K The Air Expands In A Polytropic Pr 1 (28.38 KiB) Viewed 30 times

Question 7 20 pts 2 kg of air in a piston-cylinder is initially at 462 kPa and 650 K. The air expands in a polytropic process with n-1.4 to a final temperature is 613 K. Determine the work done by the air during the expansion. Use the gas constant for air as 287 J/kg*K. In the blank below, enter the work in units of kJ. Give your answer to four significant digits and do not include units in your answer. The answer you give below must match the answer in your hand calculations. Work this problem on a separate sheet of paper. Start with equations from the equation sheet and show all work including the substitution of numbers before solving. After completing the exam, scan your work and upload at the last page of this exam.