barrons g chem exam

[utdent20]

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this is ridiculously easy and i can't get the answer..
If a balloon is filled with gas until the pressure equal 43 atm at 200K what temp will ahve to be reached for the balloon pressure to reach 55 atm??



Answer is 256 K.
are we using guy lusaac' in here?

 

[tranv117]

what about the volume?

 

[utdent20]

it does not tell us anything about the volume/

 

[tranv117]

hmm, weird. Im assuming that the volume would increase since the balloon is expanding.

Basically the equation to set it up would be P1V1/T1 = P2V2/T2. If you compare the initial pressure, volume and temperature to an ideal gas at STP, you can find out that at 43atm, 200K, the volume would be 15L. But that's as far as I got because I dont understand how you can solve for final volume and final Temp as they are both changing leaving you with two variables.

 

[utdent20]

maybe someone in here can reflect on getting the answer.

 

[utdent20]

CAN SOMEONE help me solve this problem???