上浒充通大警 SHANGHAI JIAO TONG UNIVERSITY Average Velocity of Gas Molecules The rate of motion of molecules in O2 at macroscopic equilibrium 2=3kT/m=23.4×104m2/S2 v=483m/S NAIIAO TONG UNIV R=8.314472(15)JK-1mo-1 K=R/NA=1.38X10-23 m=32X10-kg/6.02X1023mo1K=R/NA=1.38X10-23 R = 8.314472(15) J·K−1·mol−1 O2 m = 32X10-3 kg/6.02X1023mol-1