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Chemistry

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Estimate the number of moles of gas (and mass of gas assuming that it is all N2) inside your family car (or a friends if you don't have one). If the amount of gas was compressed at constant temperature to fit inside a coke can what would the pressure inside the coke can be?

Did i solve this correctly,

28.317 l x 115ft^3 = 3256 l at a standard temperature (0 C, 40 F)
3256 l x 1mole N2/22.44 l = 145.4 moles N2
Number of moles = 145.4 moles N2

145.4 moles N2/22.4 l = 6.49
28/6.49=4.3
Im kind of stuck right here, what do i need to do next?

  • Chemistry -

    Also, are the units correct here, what are the units that should be on 6.49 ex.?

  • Chemistry -

    I assume 28.317 is the conversion factor for cubic feet to L and I assume 115 ft^3 is the volume of the inside of the car.

    28.317 l x 115ft^3 = 3256 l at a standard temperature (0 C, 40 F)
    3256 l x 1mole N2/22.44 l = 145.4 moles N2
    Number of moles = 145.4 moles N2
    You are ok to here although I didn't check the math. I don't get what follows.

    145.4 moles N2/22.4 l = 6.49
    28/6.49=4.3

    You have mols (assuming the math is right) at 145.4. Convert to mass by
    145.5mol x (28 g/1 mol) = ?
    Then to convert to pressure inside a coke can, it will be
    PV = nRT. You know n,R, T and you will need the volume of the empty coke can. Solve for pressure in atm.

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