Posted by Timoefy on Friday, May 24, 2013 at 3:47pm.
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  Timoefy, Friday, May 24, 2013 at 3:54pm
Also, are the units correct here, what are the units that should be on 6.49 ex.?

Chemistry  DrBob222, Friday, May 24, 2013 at 4:57pm
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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