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charmedbeauty
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Homework Statement
In an experiment, 1.35 mol of oxygen (02) are heated at constant pressure starting at 11.0°C. How much heat must be added to the gas to double its volume? You may assume without proof, that the molar specific heats are cp=7R/2 and cv=5R/2.
Homework Equations
The Attempt at a Solution
My working so far...
Q=nCpΔT
Q=n(7R/2)ΔT
Q= 1.35(7R/2)(s-11) -----> where s= Tf
But I need some equation linking change in volume to this...
ie Q= -PΔV
But I don't Know what P is?
Perhaps I need something with ΔEint but I am not to sure.
I was thinking I will need to solve the first equation simultaneously with one with ΔV
I'm stuck as to where to go from here??
Please help any advice is greatly noted.