I need the answer for question 5.15 Measurement of Properties of Foundations 5.1

Question

I need the answer for question 5.15

Measurement of Properties of Foundations 5.15 Explain how the pressure of O, gas may be measured. Gases 516Pla Applications 517 Ex 16 De scribe the molecular/atomic basis of gas pressure. press each of the following in units of atm: a. 94.4 cm Hg b. 72.5 torr c. 150 mm Hg d. 124 kPa 518 Express each of the following in units of atm: 5.19 Express each of the following in units of psi: 5.20 Express each of the following in units of psi: a. 128 cm Hg b. 255 torr c. 1405 mm Hg d. 303 kPa a. 54.0 cm Hg b. 155 torr c. 800 mm Hg d. 1.50 atm c. 254 mm Hg d. 0.48 atm a. 12.5 cm Hg b. 46.0 torr

Explanation / Answer

Answer -

The partial pressure of any gas is defined as the pressure exerted by only that gas. Here in question, we have to find the partial pressure of O2 or pressure due to O2.

In a mixture, it can only be inferred from the analysis of the mixture composition(Moles of composition).

Explanation:

Direct measurement of a pure gas pressure at any given temperature and volume will give us the partial pressure for that gas in any other mixture at that temperature and volume.

Partial pressure is found by Dalton's Law:
Px=Ptotal (nx/ntotal)
where
Px= partial pressure of gas x
Ptotal= total pressure of all gases
nx = number of moles of gas x
ntotal= number of moles of all gases
And we know that,

PV=nRT

n=PV/RT

From here one can find the number of moles.

In case of Oxyegenthe formula became,

PO2=Ptotal (nO2/ntotal)

Where PO2 is pressure of oxygen and nO2 is the number of moles of oxygen.

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---