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9. 3.0 kg of nitrogen gas in a piston cylinder device

initially at a temperature of 300 K and a pressure of

100 kPa is compressed to a volume equal to 90% of

the initial volume and at a pressure of 140 kPa.

Determine the change in specific internal energy of

the nitrogen during the process, assuming that the

nitrogen acts as an ideal gas with constant specific

heats. [MO4]

Fig: 1