- #1
Gh. Soleimani
- 44
- 1
I have really problem with equation of the root – mean – square (rms) speed of the gas molecules when we use the universal gas constant (R) mentioned in all references.
Accordance to all reference books, we have below equation for the total translational kinetic energy:
Vrms = (3RT/ M)^0.5
Where: "M" is the molar mass
While I think above formula is wrong because for total KE, we have:
KEtotal translational = N (1/2 mo V^2) = 3/2 nRT
n = mo/M and n = N/NA then mo . NA = M . N
Therefore, we will have:
Vrms = (3RT/ M .n)^0.5
Could you please help me where I am taking a mistake?
Accordance to all reference books, we have below equation for the total translational kinetic energy:
Vrms = (3RT/ M)^0.5
Where: "M" is the molar mass
While I think above formula is wrong because for total KE, we have:
KEtotal translational = N (1/2 mo V^2) = 3/2 nRT
n = mo/M and n = N/NA then mo . NA = M . N
Therefore, we will have:
Vrms = (3RT/ M .n)^0.5
Could you please help me where I am taking a mistake?