The Molar Specific Heat (internal energy)

  • Thread starter rey242
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  • #1
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Homework Statement


One mole of an ideal diatomic gas undergoes a transition from. a to c along the diagonal path
What is the change in internal energy?

Homework Equations





The Attempt at a Solution



I've tried to use the two other paths since the internal energy is the same both ways, but I cant see anyway to reconcile the two.
 

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Answers and Replies

  • #2
Redbelly98
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What is the equation for internal energy of an ideal gas, in terms of its temperature?
 
  • #3
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[tex]\Delta[/tex]U=n*Cv*[tex]\Delta[/tex]T
 
  • #4
Redbelly98
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You can use that equation to solve this problem. You just need:

1. the temperature change between points a and c
2. Cv
3. n
 
  • #5
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I figured it out... but now I need to find the work done and the total heat entered into the system. I know it has to do with
U=Q-W

and the use of the other path(ABC).
 
  • #6
Redbelly98
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Yes, you'll need that equation (U=Q-W). You can also use the fact that W is the area under the curve in the P-V diagram.
 

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