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: Thermodynamics problem: help needed

  1. Dec 12, 2004 #1
    Thermodynamics problem: help needed!!!

    Gas in a container expands at a constant pressure of 95 atmospheres. Find the work done by the gas if the initial volume is 5 L and the final volume is 10 L. Answer in units of Joules.

    I thought this problem was straight-forward, but I missed it.

    I converted 95 atmospheres into Pascals.

    95 X 1.013e5 PA = 9623500

    I then converted L into meters ^3.

    Vi = 0.5 m^3
    Vf = 1 m^3

    With the units converted, I used the equation W = P(Vf - Vi) and got the answer 4811750 Joules. The answer is incorrect, or so I believe.

    Where did I go wrong?
     
  2. jcsd
  3. Dec 12, 2004 #2

    dextercioby

    User Avatar
    Science Advisor
    Homework Helper

    There's no problem with the conversion of the pressure's units to SI,but remember that
    [tex]1m^3=1000L [/tex]
     
  4. Dec 12, 2004 #3
    Thanks alot!
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook