Four-tenths kilogram (0.3 kg) of a certain gas is contained within a piston-cylinder assembly. The gas undergoes a process for which the pressure-volume relationship is PV° = constant. The initial pressure is 4 bar, the initial volume is 0.15 m³, and the final volume is 0.3 m3. The change in specific internal energy of the gas in the process is U2-U1 = -80 kJ. There are no significant changes in kinetic or potential energy. U2- U1 = -80 kJ %3D Gas PV = Constant Questions : 1) Calculate the work done by the piston, in kJ 2) Determine the net heat transfer for the process, in kJ( 3) Explain whether the system is loosing or gaining Heat and why

Four-tenths kilogram (0.3 kg) of a certain gas is contained within a piston-cylinder assembly. The gas undergoes a process for which the pressure-volume relationship is PV° = constant. The initial pressure is 4 bar, the initial volume is 0.15 m³, and the final volume is 0.3 m3. The change in specific internal energy of the gas in the process is U2-U1 = -80 kJ. There are no significant changes in kinetic or potential energy. U2- U1 = -80 kJ %3D Gas PV = Constant Questions : 1) Calculate the work done by the piston, in kJ 2) Determine the net heat transfer for the process, in kJ( 3) Explain whether the system is loosing or gaining Heat and why

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

Four-tenths kilogram (0.3 kg) of a certain gas is
contained within a piston-cylinder assembly.
The gas undergoes a process for which the
pressure-volume relationship is PV° = constant.
The initial pressure is 4 bar, the initial volume is
0.15 m3, and the final volume is 0.3 m3. The
change in specific internal energy of the gas in
the process is U2-U1 = -80 kJ.
There are no significant changes in kinetic or
potential energy.
U2- U1 = -80 kJ
Gas
PVO =
Constant
Questions :
1) Calculate the work done by the piston, in kJ
2) Determine the net heat transfer for the
process, in kJ
3) Explain whether the system is loosing or
gaining Heat and why

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