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October 22, 2014

October 22, 2014

Posted by **Eric** on Sunday, September 27, 2009 at 11:56pm.

I know I use PV=nRT, but what numbers do I plug in and why couldn't I use p1v1/t1=p2v2/t2?

- Chemistry -
**DrBob222**, Monday, September 28, 2009 at 12:12amYou may use the other formula if it's easier for you and you plug in the right numbers. DON'T use 5.0 L as V2 and you must change one of the pressures to make the same unit (150 atm must be changed to mm or 755 mm must be changed to atm). And T must be in Kelvin.

For PV = nRT

150 atm = P

V = 22 L

n = ??

R = 0.08205

T = 31 + 273 = 304.

Then use PV = nRT again.

P = 755 mm = 755/760 = ?? atm.

V = solve for this.

n = use from calculation above.

R = same constant as above.

T = 22 + 273 = 295

Then use the volume from this last calculation to determine how many 5.0 L balloons can be filled.

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