Initially, 0.05 kg of air is contained in a piston- cylinder device at 200°C and 1.6 MPa. The air then expands at constant temperature to a pressure of 0.4 MPa. Assume the process occurs slowly enough that the acceleration of the piston can be neglected. The ambient pressure is 101.35 kPa.
Initially, 0.05 kg of air is contained in a piston- cylinder device at 200°C and 1.6 MPa. The air then expands at constant temperature to a pressure of 0.4 MPa. Assume the process occurs slowly enough that the acceleration of the piston can be neglected. The ambient pressure is 101.35 kPa.
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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A, B, and C
Transcribed Image Text:4.
Initially, 0.05 kg of air is contained in a piston-
cylinder device at 200°C and 1.6 MPa. The air then
expands at constant temperature to a pressure of 0.4
MPa. Assume the process occurs slowly enough
that the acceleration of the piston can be neglected.
The ambient pressure is 101.35 kPa.
Rec
D. Discuss why the assumption of negligible piston
acceleration was made.
A. Determine the work (kJ) performed by the air in
the cylinder on the piston.
B. Determine the work (kJ) performed by the
piston on the ambient environment. Neglect the
cross-sectional area of the connecting rod.
C. Determine the work transfer (kJ) from the
piston to the connecting rod. Neglect friction
between the piston and cylinder. Assume that
no heat transfer to or from the piston occurs
and that the energy of the piston does not
change.
E. Which of the work interactions might be useful
for driving a car? Why?
T= Constant
State I
State 2
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