Internal Energy with Constant Volume

[Maria Davila 2I]

For Quiz 1 Prep Winter 2014, question 2 seems tricky in the sense that


where volume is constant and since
with v=0, then w=0 .

So in the end you will have


which is +2.50kJ.

Is this the correct thought process behind this?

[Maria Davila 2I]

Actually,
not V=0 .

[Niharika Reddy 1D]

Yes, that's the reasoning behind it! Since volume is constant, there's no change in volume, thus work=0 and change in internal energy=q+w=q+0=q=+2.50kJ

[Maria Davila 2I]

Thanks so much Niharika, you have been a great help in many of these posts!

[Niharika Reddy 1D]

No problem, glad I was able to help! :)