HW question 8.49

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Natalie Yakobian
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HW question 8.49

Postby Natalie Yakobian » Sun Jan 10, 2016 2:04 pm

Hi I am very confused with question 8.49

Oxygen dif uoride is a colorless, very poisonous gas that reacts rapidly with water vapor to produce O2, HF, and heat. What is the change in internal energy for the reaction of
1.00 mol OF2?

I know that deltaU = DeltaH - deltanxRxT, and that delta n is 1 based on the difference of gas mol but I can't find a temperature, V, or P in the problem so I don't really understand where to go from here.

Thank you!!

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Re: HW question 8.49

Postby Chem_Mod » Sun Jan 10, 2016 4:13 pm

We know from the ideal gas law that , therefore we can substitute in using the relationship . Also note that the reaction is performed at standard temperature, 298K.

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