Conversion


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Jennifer Torres 2L
Posts: 62
Joined: Tue Nov 14, 2017 3:01 am

Conversion

Postby Jennifer Torres 2L » Tue Jan 08, 2019 9:45 pm

Could someone explain how the conversion of the PV=nRT equation is made. I saw in class but I still do not understand how its applied separately with gasses and liquids.

Melissa Bu 1B
Posts: 36
Joined: Fri Sep 28, 2018 12:19 am

Re: Conversion

Postby Melissa Bu 1B » Tue Jan 08, 2019 9:53 pm

Dr. Lavelle used PV=nRT to convert between pressure and concentration. Concentration is in molarity, which is defined by moles over L. In the Ideal Gas Law, moles is expressed by "n" and L is expressed by "V," the volume. If we divide both sides of the Ideal Gas Law by V, we will get P=nRT/V. Re-written, that is P=(n/V)RT. Since concentration is n/V, we can write P=(concentration)RT. I believe liquids and gases are expressed in the same way in that concentration is moles (n) over L (V).


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