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!

Internal Energy vs Pressure

  1. Oct 25, 2012 #1
    1. The problem statement, all variables and given/known data
    For example in the problem if we have a volume of 10L at 15 degrees Celsius, and there is initially 100Pascals pressure, what would the final pressure be if we double the Internal Energy?

    2. Relevant equations

    3. The attempt at a solution
    I though pressure was independent of Internal Energy so it would remain unchanged? but Idk
  2. jcsd
  3. Oct 26, 2012 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    If you change the volume, and hence the pressure, isothermally then the internal energy will not change. But if the volume stays the same then pressure and temperature can only vary if the other does too. Here, internal energy is being increased, so the temperature is going up, but the volume stays the same. So what happens to the pressure?
  4. Oct 26, 2012 #3
    The pressure would also double?
  5. Oct 26, 2012 #4

    Andrew Mason

    User Avatar
    Science Advisor
    Homework Helper

    It depends. Is this an ideal gas? Can you explain your answer in terms of the ideal gas law?

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Internal Energy vs Pressure
  1. Internal energy (Replies: 1)

  2. Internal energy (Replies: 2)

  3. Internal Energy struggle (Replies: 13)