Solution Found!
Answer: At an altitude of 11,000 m (a typical cruising
Chapter 18, Problem 21E(choose chapter or problem)
At an altitude of 11,000 m (a typical cruising altitude for a jet airliner), the air temperature is \(-56.5^{\circ} \mathrm{C}\) and the air density is 0.364 \(\mathrm{kg} / \mathrm{m}^{3}\). What is the pressure of the atmosphere at that altitude? (Note: The temperature at this altitude is not the same as at the surface of the earth, so the calculation of Example 18.4 in Section 18.1 doesn’t apply.)
Equation Transcription:
Text Transcription:
-56.5degC
kg/m^3
Questions & Answers
QUESTION:
At an altitude of 11,000 m (a typical cruising altitude for a jet airliner), the air temperature is \(-56.5^{\circ} \mathrm{C}\) and the air density is 0.364 \(\mathrm{kg} / \mathrm{m}^{3}\). What is the pressure of the atmosphere at that altitude? (Note: The temperature at this altitude is not the same as at the surface of the earth, so the calculation of Example 18.4 in Section 18.1 doesn’t apply.)
Equation Transcription:
Text Transcription:
-56.5degC
kg/m^3
ANSWER:
Solution 21E
To calculate the pressure of the atmosphere at the given altitude, we shall have to use the ideal gas equation , where P= pressure, V= volume, n= number of moles, R =gas constant and T= absolute temperature.
Given that,
Density
Molar mass of air