A piston-cylinder device with a set of stops initially contains 0.4 Kg of steam at 800 KPa and 400 °C. The location of the stops corresponds to 60% of the initial volume. Now the steam is cooled. The boundary work for the final state at 800 KPa and 200 °C is Select one: О а. 38.9 Kj O b. - 125.7Kj

A piston-cylinder device with a set of stops initially contains 0.4 Kg of steam at 800 KPa and 400 °C. The location of the stops corresponds to 60% of the initial volume. Now the steam is cooled. The boundary work for the final state at 800 KPa and 200 °C is Select one: О а. 38.9 Kj O b. - 125.7Kj

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

A piston-cylinder device with a
set of stops initially contains 0.4
Kg of steam at 800 KPa and 400
°C. The location of the stops
corresponds to 60% of the initial
volume.
Now the steam is cooled.
The boundary work for the final
state at 800 KPa and 200 °C is
Select one:
а.
38.9 Kj
O b.
- 125.7Kj
С.
-39.5 Kj
O d.
125.7 KJ

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