Posted by **Dave** on Thursday, June 11, 2009 at 9:11am.

Hi!

I have another question.

So 1 kcal of heat is added to 1.5 L of oxygen in a container at constant pressure. (1atm). Then volume increases to 3.1L. they want to know total energy change.

Now i think the formula is DH=DU + PDV

so what i did was DH = 1 kcal + 1atm(3.1-1.5) = 2.6 kcal...

its wrong... i don't know why please help!

thanks again!

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