气体自由膨胀浅析江苏省高邮市八桥中学吴华太一、问题的提出在讨论气体做功时，经常要根据气体体积的变化情况来确定气体做功的性质，例如气体体积不变时，气体不做功，体积缩小时，外界对气体做功．气体在等温膨胀、等压膨胀及绝热膨胀的过程中都要对外做功，能否由此可... The analysis of free gas expansion in Gaoqiao City, Jiangsu Province, Wuqiao Taiqiao Middle School First, the question raised in the discussion of gas work, often according to the gas volume changes to determine the nature of the work done by the gas, such as gas volume is unchanged, the gas does not work, When the volume is reduced, the outside world does work on the gas. The gas must work externally during isothermal expansion, isostatic expansion and adiabatic expansion.