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October 24, 2014

October 24, 2014

Posted by **Anonymous** on Wednesday, April 29, 2009 at 8:39pm.

Do I use P1/T1=P2/T2? I was told to use that, but I don't know what pressure is.

Thanks

- Chemistry -
**Bill**, Wednesday, April 29, 2009 at 9:02pmThis problem deals with Pressure, Volume, and Temperature. Sounds like a PV/T=PV/T problem.

The reason you don't know pressure is - That's what you're solving for! The thing you're solving for must always be included in the equation that you use to solve for it.

- Chemistry -
**Bill**, Wednesday, April 29, 2009 at 9:12pmBy the way, PV/T = PV/T is just another way of expressing PV=nRT.

PV/T = PV/T just equates an initial state to a final state, showing that the overall proportions will remain the same even after some variables have changed. The amount of gas (n) is assumed to be constant, which is why it doesn't appear in the equation.

- Chemistry -
**Anonymous**, Wednesday, April 29, 2009 at 9:16pmBut I need P1. What do I do to get p1?

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