## Homework Help 8.9

Andrew Uesugi 3I
Posts: 38
Joined: Wed Sep 21, 2016 2:56 pm

### Homework Help 8.9

So I've been doing the calculations, and reached the point where I'm supposed to concert -1.48 L atm to J.

But where does 8.314 J and 0.08206 even come from?

Chem_Mod
Posts: 18676
Joined: Thu Aug 04, 2011 1:53 pm
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### Re: Homework Help 8.9

They are gas constants.

Kendall_Chaffin_3C
Posts: 25
Joined: Wed Sep 21, 2016 2:59 pm

### Re: Homework Help 8.9

These two numbers are different forms of the gas constant and would be given to you on the exam. They are also on the sheet of equations on the back of the periodic table given to you when you bought your course reader.

NinaSheridan
Posts: 30
Joined: Wed Sep 21, 2016 2:58 pm

### Re: Homework Help 8.9

When would we use one constant over the other? Does it have to do with units?

Camille_Rousculp_3A
Posts: 17
Joined: Wed Sep 21, 2016 3:00 pm

### Re: Homework Help 8.9

Yes it has to do with the units. There is a list of four equivalent gas constants on the back of the periodic table, use the one with the proper units, in the case of 8.9 I believe that it is 8.206x10^(-2) L.atm/K/mol