3. A lm nitrogen gas was placed inside a piston cylinder arrangement with initial state at 200kPa and gas was expanded to 150 kPa. Determine the change in internal energy and enthalpy, work and he if process is done a. isothermally b. isentropically c. polytropically at n= -1

3. A lm nitrogen gas was placed inside a piston cylinder arrangement with initial state at 200kPa and gas was expanded to 150 kPa. Determine the change in internal energy and enthalpy, work and he if process is done a. isothermally b. isentropically c. polytropically at n= -1

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

3. A 1m nitrogen gas was placed inside a piston cylinder arrangement with initial state at 200kPa and 150*C. The
gas was expanded to 150 kPa. Determine the change in internal energy and enthalpy, work and heat transferred
if process is done a. isothermally
b. isentropically
c. polytropically at n= -1

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