1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Ideal gas law

  1. Nov 19, 2014 #1
    1. The problem statement, all variables and given/known data
    A welder using a tank of volume 7.40×10−2m3 fills it with oxygen (with a molar mass of 32.0g/mol ) at a gauge pressure of 3.20×105Pa and temperature of 38.7∘C. The tank has a small leak, and in time some of the oxygen leaks out. On a day when the temperature is 22.9∘C, the gauge pressure of the oxygen in the tank is 1.60×105Pa .
    2. Relevant equations
    (a)Find the initial mass of oxygen.
    (b)Find the mass of oxygen that has leaked out.
    3. The attempt at a solution
    (a)PV=nRT
    n=PV/RT
    m=n*32
    link to calculations
    answer I got: 0.29225 kg
    this answer was incorrect
     
  2. jcsd
  3. Nov 19, 2014 #2

    ehild

    User Avatar
    Homework Helper
    Gold Member

    Welcome to PF.
    Type in your calculation, please.
    You used the gauge pressure instead of the pressure of the gas. Do you know what gauge pressure is?
     
  4. Nov 19, 2014 #3
    ok I see where I did wrong
    Thanks for the help.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Ideal gas law
  1. Ideal gas law problem? (Replies: 2)

  2. Ideal Gas Law Problem (Replies: 3)

  3. Ideal gas law problem (Replies: 13)

  4. Ideal gas law problem (Replies: 9)

Loading...