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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: jessiker4117 on August 22, 2004, 05:28:37 PM

Title: liters of air ?
Post by: jessiker4117 on August 22, 2004, 05:28:37 PM

    How many liters of air at 25 degrees and 1.00 atm could be stored in a 10.00-L high-pressure air tank if compressed to 25 degrees and 175 atm?

 i'm not sure how to start this, i've never seen an ex. like this either, please help if you can . thank you so much. :-*

Title: Re:liters of air ?
Post by: movies on August 22, 2004, 11:56:53 PM

I think that's low enough pressure that the ideal gas law is still a pretty good approximation, so you can use that.

Title: Re:liters of air ?
Post by: Donaldson Tan on August 24, 2004, 04:27:37 AM

PV = nRT can arranged into PV/T = nR [constant] since n (no. of moles of gas) is fixed and R is the molar gas constant.

Use P1V1/T1 = P2V2/T2 to express the 2 different condition to get your answer