86-1 Essential Concepts of the Kinetic Theory of Gases 气体动理论的基本概念 1. All matters consist of myriad(无数) of tiny 微小 molecules which areare separated A mole of any pure substance contains a definite number of identical molecules, which is called Avegadro's constant No, denoted by N=6.022×1043mol 太多!!地球村:60亿!
§6-1 Essential Concepts of the Kinetic Theory of Gases 气体动理论的基本概念 1. All matters consist of myriad （无数） of tiny 微小 molecules which are are separated N . mol A mole of any pure substance contains a definite number of identical molecules , which is called Avegadro’s constant N0 ,denoted by 太多！！地球村：60亿！
2. The molecules are moving forever and random(无序) Famous experiment--Brownian Motion 无规运动 Pollen grain花粉 Liquid
2. The molecules are moving forever and random(无序） Famous experiment—Brownian Motion. Liquid 无规运动 Pollen grain花粉
3. There is interaction between molecules The interaction force between molecules varies with the Fig 6-1 distance between molecules as shown in Fig. 6-1. The force is attractive when their distance is less than r 05 otherwise, it is repulsive(排斥的) 0≈10-10
3. There is interaction between molecules. The force is attractive when their distance is less than r0; otherwise, it is repulsive(排斥的） 10 m 10 0 r The interaction force between mo l e cul e s v a r i e s with the distance between molecules, as shown in Fig.6-1. f r r0 0 Fig.6-1
Attention: boy girl: 18.7cm)
（Attention: boy~girl: 18.7cm)
s6-2 State Parameters Equilibrium State Ideal Gas law状态参量平衡态理想气体状态方程 1. State parameters of gas状态参量 For a gas, in order to describe its properties, three (P,V, T) parameters(参数)are needed: (1) volume V: geometric parameter, cubic meters m3 (2)pressure P: mechanical parameter, Pascal: N/m2 (3)temperature T: thermal parameter, K or C Note: litter(1公升)=10-m3
§6-2 State Parameters Equilibrium State Ideal Gas law 状态参量 平衡态 理想气体状态方程 1. State Parameters of Gas 状态参量 Fo r a g a s, in o rde r t o describe its properties , three parame t e r s（参数） are needed: (1) volume V: geometric parameter， cubic meters m3 (2) pressure P: mechanical parameter, Pascal: N/m2 (3) temperature T: thermal parameter, K or C° 3 3 10 m Note: 1litter （1公升） = (P,V ,T)