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1. Air enters a machine at 373°K with a speed of 200 m/s and leaves it at 293°C. If the flow is adiabatic, and the work output by the machine is 105 N · m/kg, what is the exit air speed? What is the exit speed when the machine is delivering no work? 2. Two jets of air with the same mass flow rate mix thoroughly before entering a large closed tank. One jet is at 400◦K with a speed of 100 m/s and the other is at 200°K with a speed of 300 m/s. If no heat is added to the air, and there is no work done, what is the temperature of the air in the tank?

1. Air enters a machine at 373°K with a speed of 200 m/s and leaves it at 293°C. If the flow is adiabatic, and the work output by the machine is 105 N · m/kg, what is the exit air speed? What is the exit speed when the machine is delivering no work? 2. Two jets of air with the same mass flow rate mix thoroughly before entering a large closed tank. One jet is at 400◦K with a speed of 100 m/s and the other is at 200°K with a speed of 300 m/s. If no heat is added to the air, and there is no work done, what is the temperature of the air in the tank?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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1. Air enters a machine at 373°K with a speed of 200 m/s and leaves it at 293°C. If the flow is adiabatic, and the work output by the machine is 105 N · m/kg, what is the exit air speed? What is the exit speed when the machine is delivering no work?

2. Two jets of air with the same mass flow rate mix thoroughly before entering a large closed tank. One jet is at 400◦K with a speed of 100 m/s and the other is at 200°K with a speed of 300 m/s. If no heat is added to the air, and there is no work done, what is the temperature of the air in the tank?

 

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