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: Engineering Thermo. Question

  1. Oct 8, 2006 #1
    Hey guys, I have been having a really hard time trying to figure out this question. It seems like everything I do, I can not get resonable answers. If you can help me, that would be great.

    Problem: A 500-L tank stores 100kg of nitrogen gas at 150 degrees K. To design the tank, the pressure must be estimated and three different methods are suggested:
    a) Nitrogen Tables
    b) Ideal Gas assumption
    c) Generalized compressibility chart
  2. jcsd
  3. Oct 8, 2006 #2


    User Avatar
    Science Advisor
    Gold Member

    So what's your question?
  4. Oct 8, 2006 #3
    I can't get the pressure by using any of the Nitrogen tables for an ideal gas. They seem not to have enough information on them to find pressure. When I use the ideal gas equation, the pressure comes out to be really really high, and when I find Tr and Vr for the compressability chart, nothing matches up. I did not have this problem when I used R-134a for a similar question. Everything went smooth for that gas, but it seems like you can't solve this question for nitrogen.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook