气体压强是热学部分的重要概念,也是学习中的难点,正确地理解气体压强的概念是解决问题的关键,下面就从微观和宏观的两个角度来理解气体压强的概念.一、从微观的角度理解气体压强例1下列说法正确的是()(A)气体对器壁的压强就是大量气体分子作用在器壁单位面积上的平均作用力(B)气体对器壁的压强就是大量气体分子单位时间作用在器壁上的平均冲量(C)气体分子热运动的平均动能减少,气体的压强一定 Gas pressure is an important part of the heat concept, but also learning difficulties, the correct understanding of the concept of gas pressure is the key to solve the problem, the following two aspects from the micro and macro to understand the concept of gas pressure. (A) The pressure on the wall of the gas is the average force acting on the wall per unit area of ​​a large number of gas molecules. (B) The pressure of the gas on the wall of the vessel is the mass of gas molecules The average impulse acting on the wall per unit of time (C) The average kinetic energy of the thermal movement of gas molecules decreases, the gas pressure must be constant