Engineering Board Exam Reviewer · Thermodynamics · medium
What is the mass of air in a 2 m3 tank at 500 kPa absolute and 300 K? (R = 0.287 kJ/kg· K)
- 0.401 kg
- 5.81 kg
- 129.05 kg
- 11.61 kg
Answer
D. 11.61 kg
Solution
m = PV/(RT) = 500(2)/[0.287(300)] = 11.61 kg.
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