A piston {cylinder device contains a gas at 1 bar absolute pressure occupying 1 m3 (state 1). At this state, the internal energy of the gas is 50 kJ. The gas is slowly compressed to an absolute pressure of 10 bar (state 2) such that PV = constant. During the compression process, an electric resistor within the cylinder receives a current of 8 A from an external battery of 6 V for a duration of 3 minutes. During compression process, 38.9 kJ of heat rejected from the gas. (a) Calculate total work (kJ) for the gas; (b) Determine the internal energy (kJ) of the gas at state 2.
A piston {cylinder device contains a gas at 1 bar absolute pressure occupying 1 m3 (state 1). At this state, the internal energy of the gas is 50 kJ. The gas is slowly compressed to an absolute pressure of 10 bar (state 2) such that PV = constant. During the compression process, an electric resistor within the cylinder receives a current of 8 A from an external battery of 6 V for a duration of 3 minutes. During compression process, 38.9 kJ of heat rejected from the gas. (a) Calculate total work (kJ) for the gas; (b) Determine the internal energy (kJ) of the gas at state 2.
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 piston {cylinder device contains a gas at 1 bar absolute pressure occupying 1 m3 (state 1). At this state, the internal energy of the gas is 50 kJ. The gas is slowly compressed to an absolute pressure of 10 bar (state 2) such that PV = constant. During the compression process, an electric resistor within the cylinder receives a current of 8 A from an external battery of 6 V for a duration of 3 minutes. During compression process, 38.9 kJ of heat rejected from the gas.
(a) Calculate total work (kJ) for the gas;
(b) Determine the internal energy (kJ) of the gas at state 2.
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