15May/12Off
Root Energy
Root Energy
How to calculate root mean square (rms) and average kinetic energy?
Calculate the root-mean-square (rms) speed of SF6 at 0° C and the average kinetic energy of one SF6 molecule at 0° C.
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u=√(3RT/M) where M=molar mass [R=8.31 J/(mol*K), T=273 K, M=0.146 Kg/mol]
u=√((3*8.31*273)/0.146)=216 m/s
KE=1/2mv²=1/2*0.146 Kg*(216 m/s)²=3410 J
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