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Nhan Nguyen 2F
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HW Q.8.49

Postby Nhan Nguyen 2F » Fri Jan 19, 2018 12:37 am

Can someone explain to me why we use PV=nRT for this problem? I'm just a little confused on when we can use the ideal gas law. Thank you

Lisa Tang 1C
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Re: HW Q.8.49

Postby Lisa Tang 1C » Fri Jan 19, 2018 9:28 am

You use PV=nRT for this problem because of the equation on page 290 of the textbook.
delta H = delta U + delta ngasRT where delta ngas=the final number of moles of gas-the initial number of moles of gas. The problem gives you a delta H value you can plug in, and with that, you are able to use PV=nRT/the ideal gas law to relate delta H and delta U.
Hope that helps!

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Re: HW Q.8.49  [ENDORSED]

Postby Chem_Mod » Fri Jan 19, 2018 10:09 am

Great answer.

I will do a similar example in class today.

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