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Homework Help: Physics Lab - Measurement of Absolute Zero?

  1. Apr 13, 2009 #1
    This problem seems straightforward and easy enough, but I still want to check my answers.

    Suppose the pressure of the bulb (light bulb I'm guessing used in experiment) is 20 psi (absolute) at 20C. What would you predict the pressure to be at 0C? What would you predict would be at 100C?

    I used the ideal gas law equation P = nRT/V and got:
    0C Pressure = 18.6 psi
    100C Pressure = 25.5 psi

    How'd I do? Did I get it right? Big Thanks!!!
  2. jcsd
  3. Apr 13, 2009 #2
    Sorry, I'm missing something, where does "absolute zero" come in?
  4. Apr 13, 2009 #3


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    Staff Emeritus
    Science Advisor
    Homework Helper

    Those answers are correct.

    In the future it would be good to show how you calculate your answers ... if they're wrong, we wouldn't be able to help unless we can see your work. :smile:

    p.s. whybother makes a good point, the thread title "Measurement of Absolute Zero?" seems unrelated to the question that was asked.
  5. Apr 13, 2009 #4
    That's the headline in the lab manual! I'm not sure why the absolute matters either! Big Thanks for helping! next time i'll include work.
  6. Apr 13, 2009 #5
    That's the headline in the lab manual? That's horrifying... 0K has nothing to do with this problem... at all...
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