# PV = nRT; units

1. Feb 3, 2009

### anisotropic

When using the ideal gas law equation and solving for V, with constant R = 8.314 J·mol−1·K−1, what are the resultant units? L or m3?

I always remember it being in L, but wouldn't it be m3 based purely on the units being put into the equation?

Other units I'm using:

P: Pa (not kPa)
T: K

Last edited: Feb 4, 2009
2. Feb 4, 2009

### Staff: Mentor

m3

For L one uses 8.314x103

3. Feb 4, 2009

### Gokul43201

Staff Emeritus
Alternatively, there's also the other commonly used unit system, seen in R=0.0821 L-atm/(K-mol)

4. Feb 4, 2009

### nrqed

what you need to know to answer the question is that $1 Pa = 1 N/m^2$ (Newton per meter squared) and that $1 N = 1 J/m$ so that $1 Pa = 1 J/m^3$ which shows that V comes out in $m^3$