How do you find partial pressures of gases?

fiona-clark_6096d214ec077fiona-clark_6096d214ec077
in Science & Mathematics

A mixture of gases contains 4.14 g of N2, 5.56 g of H2, and 7.06 g of NH3. If the total pressure of the mixture is 5.06 atm, what is the partial pressure of each component?

Find the partial pressures of N2, H2, and NH3.

I'm totally confused. Help me. =(

Comments

  • anonymousanonymous

    Find the mole fraction of each gas:

    4.14g N2(1mol/28.02g) = 0.1478mol

    5.56g H2(1mol/2.02g) = 2.752mol

    7.06g NH3(1mol/17.04g) = 0.4143mol

    0.1478/(0.1478 + 2.752 + 0.4143) = 0.0446

    2.752/(2.752 + 0.1478 + 0.4143) = 0.830

    0.4143/(0.4143 + 0.1478 + 2.752) = 0.125

    Multiply each mole fraction by total pressure:

    0.0446(5.06) = 0.226atm (NH3)

    0.830(5.06) = 4.21atm (H2)

    0.125(5.06) = 0.633atm (N2)

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