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A spring-loaded piston-cylinder device contains 0.5 kg of water initially at 90℃ and with an...

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Mechanical Engineering

A spring-loaded piston-cylinder device contains 0.5 kg of water initially at 90℃ and with an initial quality of 20.9%. At its initial state, the spring is relaxed and does not exert any force on the piston. The device is now heated until the pressure is 400 kPa and the new temperature is 250℃.

What is the boundary work done by the water during this process?

kJ

What is the total amount of heat transfer into the system?

kJ

BONUS: If the device has a cross-sectional area of 0.14 m2, what is the spring constant of the spring in this device?

kNm

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