A gas mixture consists of molecules of tyres A, B, and C with masses mA > mB > mC. Rank the three types of molecules in decreasing order of

a) average KE

b) rms speeds

Answer:

a) From the above result, the pressure and temperature are the same, therefore,

KEc > KEb > KEa

b) When P and T are constant,

(Vrms)c > (Vrms)b > (Vrms)a