Engineering Board Exam Reviewer · Thermodynamics · hard
A gas mixture contains 2 kg of N2 (M = 28) and 1 kg of O2 (M = 32) at a total pressure of 300 kPa. What is the partial pressure of N2?
- 200.00 kPa
- 208.70 kPa
- 91.30 kPa
- 150.00 kPa
Answer
B. 208.70 kPa
Solution
n N2 = 2/28 = 0.07143 kmol; n O2 = 1/32 = 0.03125 kmol. y N2 = 0.6957. P N2 = y P = 0.6957(300) = 208.70 kPa.
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