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Homework Help: Algebra 2 Help

  1. Oct 26, 2006 #1
    A problem on my homework reads like this:

    The volume of a gas varies directly as it's temperature measured in degrees Kelvin and inversely as its pressure. When the temperature of a certain gas is 250 degrees K and its pressure is 76.2 cm of mercury, its volume in 750 cm cubed.
    a) Find the constant variation.
    b) Write a variation equation that models the situation.
    c) What would the volume of the gas be if its temp. was 300 degrees K and its pressure was 73.66 cm of mercury? Write the answer to the nearest cubic cm.

    These are the answers I got. Could someone tell me if they're right?
    a) k=228.6
    b) V = 228.6T divided by P (Sorry, I couldn't get LaTeX to work)
    c) 931 cm cubed
    Last edited: Oct 26, 2006
  2. jcsd
  3. Oct 26, 2006 #2


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    Science Advisor

    a) and c) are correct.

    b) is not correct, because you don't have the volume "inversely" proportional to temperature.
  4. Oct 26, 2006 #3
    Is it right now? I had the LaTeX up before, so it made it look different.
  5. Oct 26, 2006 #4
    There, I got the LaTeX to work, so now my answer to b) looks like this:

    [tex] v = \frac{228.6T}{P} [/tex]

    If this is not right, I'm not sure how to fix it...
    Last edited: Oct 26, 2006
  6. Oct 26, 2006 #5
    that is correct
  7. Oct 26, 2006 #6
    Whoops, I meant to put 228.6. And thanks again. I wish I was as good at math as you are!
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