Register to reply

Finding Final Volume - almost got it

by sisigsarap
Tags: final, volume
Share this thread:
Jan25-05, 12:21 PM
P: 17
Ok, here is what is given:

1.00 mol O2
Ti = 300K
Vi = 5.00L
4400 j of energy transfered by heat to the system
Vf = ?
Constant Pressure = 29.4 J/mol * K

So I set the problem up using Q = n(Constant Pressure)(Tf - T-i)
Solving for Tf I find that Tf is equal to 449.7K.

Then using equation (Vf - Vi) = (nR(Tf - Ti)) / P

Vf = ((1.00mol * 8.31 J/mol*K * 149.7K) / (1.013*10^5 N/m^2)) + 5.00L

I am getting Vf = 17.28 L

Can anyone tell me what I am doing wrong? My teacher told me the answer should be 7.52, could he of possibly meant 17.52?

Any help would be appreciated!
Phys.Org News Partner Science news on
Bees able to spot which flowers offer best rewards before landing
Classic Lewis Carroll character inspires new ecological model
When cooperation counts: Researchers find sperm benefit from grouping together in mice
Jan25-05, 12:59 PM
Sci Advisor
HW Helper
P: 11,896
1.The teacher is right.
2.The final temperature u computed is right...

3.The formula u used is wrong...

Jan25-05, 01:28 PM
HW Helper
P: 4,124
Quote Quote by sisigsarap

Constant Pressure = 29.4 J/mol * K
This is the specific heat capacity, not pressure.

Register to reply

Related Discussions
Finding Final Speed Using Introductory Physics Homework 3
Finding final temperature Introductory Physics Homework 1
Finding final velocity from a fall Introductory Physics Homework 11
Very Difficult : Finding final Volume gasses (for me) Chemistry 10
Finding Final Velocity by Energy Techniques Introductory Physics Homework 4