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Applying the Entropy Balance: Closed SystemsTwo m3 of air
Chapter 6, Problem 40P(choose chapter or problem)
Two m3 of air in a rigid, insulated container fitted with a paddle wheel is initially at 293 K, 200 kPa. The air receives 710 kJ by work from the paddle wheel. Assuming the ideal gas model with \(c_{v}=0.72 \mathrm{\ kJ} / \mathrm{kg} \cdot \mathrm{K}\), determine for the air (a) the mass, in kg, (b) final temperature, in K, and (c) the amount of entropy produced, in kJ/K.
Questions & Answers
QUESTION:
Two m3 of air in a rigid, insulated container fitted with a paddle wheel is initially at 293 K, 200 kPa. The air receives 710 kJ by work from the paddle wheel. Assuming the ideal gas model with \(c_{v}=0.72 \mathrm{\ kJ} / \mathrm{kg} \cdot \mathrm{K}\), determine for the air (a) the mass, in kg, (b) final temperature, in K, and (c) the amount of entropy produced, in kJ/K.
ANSWER:Solution 40P
Step 1 of 5
For air in a rigid insulated container fitted with a paddle wheel we need to find, (a) mass in kg, (b) final temperature in ‘K’ and (c) the amount of entropy produced in kJ/K