1 bar. During an interval A closed, rigid tank fitted with a paddle wheel contains 2.0 kg of air, initially at addle wheel transfers energy to the air at a rate of 1 kW. During this time interval, the air also receives energ ate of 0.5 kW. These are the only energy transfers. Assume the ideal gas model for the air, and no overall chan potential energy. Do not assume specific heats are constant.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A closed, rigid tank fitted with a paddle wheel contains 2.0 kg of air, initially at 200°C, 1 bar. During an interval of 10 minutes, the
paddle wheel transfers energy to the air at a rate of 1 kW. During this time interval, the air also receives energy by heat transfer at a
rate of 0.5 kW. These are the only energy transfers. Assume the ideal gas model for the air, and no overall changes in kinetic or
potential energy. Do not assume specific heats are constant.
Determine the change in specific internal energy for the air, in kJ/kg, and the final temperature of the air, in °C.
Transcribed Image Text:A closed, rigid tank fitted with a paddle wheel contains 2.0 kg of air, initially at 200°C, 1 bar. During an interval of 10 minutes, the paddle wheel transfers energy to the air at a rate of 1 kW. During this time interval, the air also receives energy by heat transfer at a rate of 0.5 kW. These are the only energy transfers. Assume the ideal gas model for the air, and no overall changes in kinetic or potential energy. Do not assume specific heats are constant. Determine the change in specific internal energy for the air, in kJ/kg, and the final temperature of the air, in °C.
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