Ask Question
12 February, 09:35

a heliox tank contains 32% helium and 68% oxygen. the total pressure in the tank is 395 kPa. What is the partial pressure of oxygen in the tank?

+3
Answers (1)
  1. 12 February, 11:43
    0
    Pp O2 = 82.944 KPa

    Explanation:

    heliox tank:

    ∴ %wt He = 32%

    ∴ %wt O2 = 68%

    ∴ Pt = 395 KPa

    ⇒ Pp O2 = ?

    assuming a mix of ideal gases at the temperature and volumen of the mix:

    ∴ Pi = RTni/V

    ∴ Pt = RTnt/V

    ⇒ Pi/Pt = ni/nt = Xi

    ⇒ Pi = (Xi) * (Pt)

    ∴ Xi: molar fraction (ni/nt)

    ⇒ 0.68 = mass O2/mass mix

    assuming mass mix = 100 g

    ⇒ mass O2 = 68 g

    ∴ molar mass O2 = 32 g/mol

    ⇒ moles O2 = (68 g) (mol/32 g) = 2.125 mol O2

    ⇒ mass He = 32 g

    ∴ molar mass He = 4.0026 g/mol

    ⇒ moles He = (32 g) (mol/4.0026 g) = 7.995 mol He

    ⇒ nt = nO2 + nHe = 2.125 mol + 7.995 mol = 10.12 moles

    molar fraction O2:

    ⇒ X O2 = nO2/nt = (2.125 mol/10.12 mol) = 0.2099

    ⇒ Pp O2 = (X O2) (Pt)

    ⇒ Pp O2 = (0.2099) (395 KPa)

    ⇒ Pp O2 = 82.944 KPa
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “a heliox tank contains 32% helium and 68% oxygen. the total pressure in the tank is 395 kPa. What is the partial pressure of oxygen in the ...” in 📙 Chemistry if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers