## PV=nRT

$PV=nRT$

JosephLew3C
Posts: 21
Joined: Wed Sep 21, 2016 3:00 pm

### PV=nRT

When using the ideal gas equation is it more typical to see pressure represented in pascals or atm or does it just vary by situation?

sophianguyen_1N
Posts: 23
Joined: Wed Sep 21, 2016 3:00 pm

### Re: PV=nRT

I believe atms are the most common unit, but it does vary question to question. Make sure to double check the units, because the constant r also depends on the units given.

Ivy Kwok 2I
Posts: 25
Joined: Wed Sep 21, 2016 2:58 pm

### Re: PV=nRT

I believe that with regards to the ideal gas law, when the gas constant (R) is involved, we would use atmospheres, but in terms of other equations, we calculate using pascals.

Chem_Mod
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### Re: PV=nRT

Ivy Kwok 3F wrote:I believe that with regards to the ideal gas law, when the gas constant (R) is involved, we would use atmospheres, but in terms of other equations, we calculate using pascals.

Keep in mind that the gas constant, R, itself can be written using different numbers if the units are different, so this answer isn't entirely correct.

As for the original question, just make sure your units cancel. This is why it's helpful to write units out as well when working out a problem instead of blindly plugging numbers into an equation.