Need help on a Chem Question

1. Oct 16, 2006

PhysicsNoob88

Question: A sample of hydrogen gas, collected at 100 C and 1.0 atm., has a volume of 350 ml (0.350 lit.). What will be the pressure after it is transferred to a 4.0 lit. flask and cooled to 25 C? (temp must be in degrees of Kelvin)

I had assumed using the formula V2 = P1 X V1 / P2 but i am not getting anything that makes sense. I think its two formulas needed but am not sure. Any assistance would be greatly apperciated

2. Oct 16, 2006

Smith4046

Go to your favorite search engine and type in "combined gas law".

Think that will help.

Best of health.

Steve

3. Oct 16, 2006

$$pV = nRT$$. Look at the values given. Which ones are being kept constant?

4. Oct 16, 2006

PhysicsNoob88

Thanks! That did the trick alright

5. Oct 16, 2006

PhysicsNoob88

Can someone verify this is correct?

P1V1/T1 = P2V2/T2
(1.0atm)(.35lit)/(373K) = P(4.0lit)/(298K)
(104.3) = (1492)P
.070atm = P

6. Oct 16, 2006