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Internal energy of ideal gas

  • #1

Homework Statement



A container of volume 0.72 m^3 contains 1.4 mol of argon gas at 24 degrees C.

Assuming argon behaves as an ideal gas, find the total internal energy of this gas. The value of gas constant is 8.31451 J/mol x K.

Answer in units of J.


Homework Equations



PV=nRT

The Attempt at a Solution



I'm not sure if that's the right formula or not. I don't know which letter would equal the internal energy. Am I missing a formula somewhere?

My teacher isn't going to be here next week, so I'm kind of stuck learning this on my own. I don't have too much of an understanding of it at all. Thanks for the help.

Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
Ok, I found the formula 3/2nRT.

I got 5185.759887 J, and it was right.

I'm not quite sure where this formula came from. Can anyone explain that?
 
Last edited:
  • #3
vela
Staff Emeritus
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I can't remember it off the top of my head. Isn't the formula derived in your textbook?
 

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