Find the rms speed in air at 5°C and 1.00 atm of (a) the N2 molecules, (b) the O2 molecules, and (c) the CO2?

Find the rms speed in air at 5°C and 1.00 atm of (a) the N2 molecules, (b) the O2 molecules, and (c) the CO2

Find the rms speed in air at 5°C and 1.00 atm of (a) the N2 molecules, (b) the O2 molecules, and (c) the CO2?
Root mean square velocity is given by


vrms = √( 3 · R · T / M)





R universal gas constant


T absolute temperature


M molar mass





(a)


vrms = √( 3 · 8.314472J/molK · 278.15K / 0.028kg/mol )


= 497.8m/s





(b)


vrms = √( 3 · 8.314472J/molK · 278.15K / 0.032kg/mol )


= 465.6m/s





(c)


vrms = √( 3 · 8.314472J/molK · 278.15K / 0.044kg/mol )


= 397.1m/s

ovary