A spring-loaded piston-cylinder device contains 0.21 kg of water initially at 90°C and with an initial quality of 17.8%. 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°C. 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 If the device has a cross-sectional area of 0.08 m², what is the spring constant of the spring in this device? kN m

A spring-loaded piston-cylinder device contains 0.21 kg of water initially at 90°C and with an initial quality of 17.8%. 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°C. 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 If the device has a cross-sectional area of 0.08 m², what is the spring constant of the spring in this device? kN m

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

Question

100%

A spring-loaded piston-cylinder device contains 0.21 kg of water initially at 90°C and with an initial quality of
17.8%. 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°C.
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
If the device has a cross-sectional area of 0.08 m², what is the spring constant of the spring in this device?
kN
m

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