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: Non-ideal Gas: Withdrawing gas from bottle with increasing temperature

  1. Sep 10, 2007 #1
    1. The problem statement, all variables and given/known data
    A gas mixture (80.1 mol% CO2, 12.2 mol% CO and balance Ar) is stored in a gas bottle. The volume of the gas bottle is 317.0 liters. Initially the pressure of the gas in the bottle is 14.2 MPa and the temperature is 25.3 °C

    Qn: The gas is being withdrawn from the bottle at a constant rate of 310.2 moles/hour. As this is occurring the temperature of the gas in the bottle is increasing at a rate of 13.7 °C/hr. How long does it take for the pressure of the gas in the bottle to reach 3.0 MPa?

    2. Relevant equations
    Non-ideal gas equation: PV = znRT

    3. The attempt at a solution
    I tried doing this by calculating the pressure of the gas in the bottle every one hour. Since the temperature is increasing, the pressure will constantly be changing every moment. Next i plotted a graph of pressure of gas vs time and joined the dots. i could locate the 3.0 MPa point but i think it's not accurate enough. Can anyone help out please? Thanks!
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted