Root Mean Square Speed Video Lessons

Concept:

# Problem: Select the gas with the largest root-mean-square molecular speed at 25°C.A. All the gases have the same root-mean-square molecular speed at 25°C B. HeC. SF6D. CO2E. CH4

###### FREE Expert Solution

When calculating for root mean square speed (μrms), we will use the following equation:

$\overline{){{\mathbf{\mu }}}_{{\mathbf{rms}}}{\mathbf{=}}\sqrt{\frac{\mathbf{3}\mathbf{RT}}{\mathbf{M}}}}$

µrms = rms speed,
R = 8.314 J/(mol·K)
T = temperature, K
M = molar mass, kg/mol

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###### Problem Details

Select the gas with the largest root-mean-square molecular speed at 25°C.

A. All the gases have the same root-mean-square molecular speed at 25°C

B. He

C. SF6

D. CO2

E. CH4