A well-insulated tank fitted with an electrical resistor of negligible mass holds 1.5 kg of nitrogen (N2 ), initially at 30 °C, 0.2 MPa. Over a period of 20 minutes, electricity is provided to the resistor at a constant voltage of 120 V and with a constant current of 1 ampere. Assuming ideal gas behavior and constant specific heats, determine the nitrogen’s final temperature (in K), and the final pressure (in bar

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A well-insulated tank fitted with an electrical resistor of
negligible mass holds 1.5 kg of nitrogen (N2

), initially at 30 °C, 0.2
MPa. Over a period of 20 minutes, electricity is provided to the
resistor at a constant voltage of 120 V and with a constant current
of 1 ampere. Assuming ideal gas behavior and constant specific
heats, determine the nitrogen’s final temperature (in K), and the
final pressure (in bars).

Nitrogen, N₂
m = 1.5 kg
T₁ = 30 °C
P₁ = 0.2 MPa
0000000
+
Welec
Transcribed Image Text:Nitrogen, N₂ m = 1.5 kg T₁ = 30 °C P₁ = 0.2 MPa 0000000 + Welec
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