Question: Problem 4 . A well - insulated piston - cylinder contains 3 . 5 mol of an ideal gas ( C P = 2 8

Problem 4. A well-insulated piston-cylinder contains 3.5 mol of an ideal gas (C
P =28
J/(mol K)). Its pressure of 4.8 bar is obtained by a 90.-kg weight on the piston, which
weights 10. kg. The gas is at a temperature of 55
oC. Suppose a 100.-kg weight was
suddenly added to the piston. What is the final temperature and pressure of the gas?

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