wbrandi118
21.11.2019 •
Physics
1-ft3 of air is contained in a spring-loaded piston-cylinder device. the spring constant is 6lbf/in, and the piston diameter is 12 in. when no force is exerted by the spring on the piston, the state of the air is 250 psia and 450◦f. this device is now cooled until the volume is one-third its original size. determine the change in the specific internal energy and enthalpy of the air.
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