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August 21, 2014

Homework Help: Chemistry (pleas help!)

Posted by Celine on Thursday, March 24, 2011 at 12:10pm.

a stressed chemistry student is hyperventilating into a paper bag. The student stops to wip his brow after a few breaths, and the bag is at 5.7 KPa and the temperature in the lecture hall is 24 degrees C. The bag is 0.75 L full. The student then goes at it again, and completely fills the bag with air to 1.2 L and 7.2KPa. The student panics, and runs out of the lecture hall... when he gest outside, the inflated paper bag explodes. What is the temperature outside?



Chemistry (please help!!) - Celine, Thursday, March 24, 2011 at 12:20am
My answer is 594 K... which is excessively high...



Chemistry (please help!!) - Celine, Thursday, March 24, 2011 at 12:23am
Do I not need to turn the temperature to Kelvin for the equation?? If I don't turn it to K I get 49 C... which is a more reasonable value... I left the other values with their same units... please someone answer...



Chemistry (please help!!) - Liz, Thursday, March 24, 2011 at 8:39am
(P1xV1)/T1 = (P2xV2)/T2

T2 = (P2xV2xT1)/(P1xV1)



Chemistry (please help!!) - Celine, Thursday, March 24, 2011 at 12:08pm
That's the equation I use and I get 594 K... I think that's a really high value, is that answer right?

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