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Mike Vinci 2B
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Joined: Fri Sep 29, 2017 7:03 am
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Postby Mike Vinci 2B » Sun Feb 04, 2018 11:52 pm

Hi all,
Throughout the book I have noticed that at times we talk about standard enthalpy entropy of reactions at a constant 1 atm, yet other questions in the book might use bars or tours to represent the pressure. While I understand the importance of moles, kelvins, Celsius, and liters, which units of pressure are we expected to work with and should we know conversion factors given that 1 torr versus 1 atm may be different in the equations were are using.


Nora 1F
Posts: 46
Joined: Fri Sep 29, 2017 7:04 am

Re: Units

Postby Nora 1F » Mon Feb 05, 2018 12:00 am

I believe that 1 bar would be the unit used in the definition of these conditions, but because the difference between 1 bar and 1 atm is so small and we are accustomed to using atm, you will often see them interchanged.

Posts: 44
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Re: Units  [ENDORSED]

Postby RyanTran2F » Sat Feb 10, 2018 1:40 pm

I think in class Dr. Lavelle uses 1 atm instead of 1 bar. Also if you are required to interchange between 2 units of pressure, I think he would give you that information on the Constants and Equations Sheet. I hope that helps :)

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