题12-1:C 第二草气动理论 He, N2, nHe=NN,, KEHE =EK k平2 kT. P=nkT 题12-2:C n4=nB=n,(yVt2)4=(√2)B=( v22 厂,|3kT3RT3PV 々P=nk B4:P:P=T:TB:Tc=1:4:16,第十二章 气体动理论 习 题 课 题12-1: 2 2 2 , , , , He N n N He N k He k N = = 平 平 3 , , 2 k 平 = = kT P nkT C 222 , ( ) ( ) ( ) nnn A B C A B C = = = = vvv 2 3 3 3 , , kT RT PV P nkT m M m = = = = v 题12-2: C 222 ( ) : ( ) : ( ) : : , : : : : 1: 4:16, A B C A B C A C A B C TTT P P P T T T = = = vvv