0.03-m of air is contained in the spring-loaded piston-cylinder device shown in Fig. P4-53. The spring constant is 875 N/m, and the piston diameter is 25 cm. When no force is exerted by the spring on the piston, the state of the air is 2250 kPa and 240°C. This device is now cooled until the vol- ume is one-half its original size. Determine the change in the internal energy and enthalpy

Elements Of Electromagnetics
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0.03-m of air is contained in the spring-loaded piston-cylinder device shown in Fig. P4-53. The spring constant is 875 N/m, and the piston diameter is 25 cm. When no force is exerted by the spring on the piston, the state of the air is 2250 kPa and 240°C. This device is now cooled until the vol- ume is one-half its original size. Determine the change in the internal energy and enthalpy.
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