题12-9:已知 第二气体动理论 O2,P=1.013×103P,T=300K 求:(1),n:(2)p;(3),;(4),d 解 P (1),n =244×1043/m kT m PM =1.3/g/m 丿RT 3 (3) kT=6.21×1021J (4)2d =345×10°m,(4),d第十二章 气体动理论 习 题 课 题12-9:已知: 5 2 , 1.013 10 , 300 , O P P T K = = a 求:(1),n;(2),ρ;(3),ε;(4),d 解: 25 3 (1), 2.44 10 / P n m kT = = 3 (2), 1.3 / m PM n kg m V RT = = = 3 21 (3), 6.21 10 2 k kT J − 平 = = 9 3 1 (4), 3.45 10 , d m n − = = (4), 3 A A N d V =