1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: How would I calculate the work done by the gas molecules?

  1. Jan 7, 2016 #1
    1. The problem statement, all variables and given/known data
    Hello, I just need help figuring out how to calculate the work done by the gas molecules for my physics homework :)
    Formula given: W=Px∆V (W=work, P=pressure, and V=volume)
    What I know: So my calculated volume is 1.7x10^-22m^3.
    Pressure=0.25 A t m (atmospheric pressure)
    I just need help figuring out how I would multiply the two together.

    2. Relevant equations

    3. The attempt at a solution
    Would I change 0.25 A t m to scientific notation? So it would be 2.5x10^-1, then if I multiplied it by 1.7x10^-22m^3 it would be 4.25x10^-23 Joules of work done?
  2. jcsd
  3. Jan 7, 2016 #2
    To get the work in joules, it is best to convert the pressure to SI units (pascal).

    But I suspect you are wrong about the volume change.
  4. Jan 7, 2016 #3
    Ok, so 0.25 A t m = 25331.25 Pascal, which is 2.533125x10^4 in scientific notation. Would I then just multiply the two together? And no, I did all my calculations correct, the volume change is 1.7x10^-22m^3, I even had another person on here help me achieve that answer.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted