气体对外做功，内能减少是高中物理新教材第二册第十一章中新增的演示实验。实验要求用灵敏温度计测出气体压强增大到一定程度时，温度计的示数和气体冲开胶塞后温度计的示数明显变小，用于验证空气在膨胀时对外做功，内能减少，温度降低。但是一般中学的物理实验室只配备热敏 The work done by gas to reduce the internal energy is a new demonstration experiment in the eleventh chapter of the second volume of the new high school physics textbook. The experiment requires that when the pressure of the gas is increased to a certain degree with a sensitive thermometer, the number of thermometers and the number of thermometers after the gas flushes out the rubber plug are significantly reduced. It is used to verify that the air does work when expanding, the internal energy decreases, and the temperature decreases. . However, physical labs in general secondary schools are only equipped with thermal