Air is contained inside a simple piston cylinder device as shown in the figure. It expands from state 1 to state 2 according the process information shown below: State 1: P₁= 200 kPa; ₁ = 0.5 m³; T₁ = 300 K Process 1-2: Expansion process (see graph) where P = 50 kPa + (300 kPa/m³) State 2: P₂ = 350 kPa; 21.0 m³ Determine: the work done on or by the air contained in the piston-cylinder device, in kJ (indicate direction, i.e., is the work done on or by the air?) P 350 kPa 2: 200 kPa Air 1 0.5 1.0 V

Air is contained inside a simple piston cylinder device as shown in the figure. It expands from state 1 to state 2 according the process information shown below: State 1: P₁= 200 kPa; ₁ = 0.5 m³; T₁ = 300 K Process 1-2: Expansion process (see graph) where P = 50 kPa + (300 kPa/m³) State 2: P₂ = 350 kPa; 21.0 m³ Determine: the work done on or by the air contained in the piston-cylinder device, in kJ (indicate direction, i.e., is the work done on or by the air?) P 350 kPa 2: 200 kPa Air 1 0.5 1.0 V

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

Problem 22.3
Air is contained inside a simple piston cylinder device as shown in the figure. It expands from state 1 to state 2
according the process information shown below:
State 1: P₁= 200 kPa;
₁ = 0.5 m³;
T₁ = 300 K
Process 1-2: Expansion process (see graph) where P = 50 kPa + (300 kPa/m³)
State 2: P₂ = 350 kPa; ₂ = 1.0 m³
Determine: the work done on or by the air contained in the
piston-cylinder device, in kJ (indicate direction, i.e., is the work
done on or by the air?)
Air
P
350 kPa
200 kPa
1
0.5
1.0
Ans: d) 185 kJ <≤ Wnet] ≤ 200 kJ
K

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