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人教版高二物理(必修加选修)课本第69页第2个实验:气体对外做功内能减少。其表述是,厚壁容器的一端通过胶塞插进1支灵敏温度计和1根气针;另一端有1个可移动的胶塞(用卡子卡住),用打气筒慢慢向容器内打气,以增大容器内的压强。当容器内的压强增大到一定程度时读出温度计的示数,打开卡子,让气体冲开胶塞后,再读出该温度计示数。实验时可以观察到,胶塞冲出容器口后,温度计的示数明显变小。实验装置如图1所示。
PEP 2 Physics (Compulsory and Optional) Textbook Page 69 第 2 实 Experiment: The internal work of gas is reduced internally. The statement is that one end of the thick-walled container is inserted into a sensitive thermometer and a gas needle through a rubber stopper; the other end of the thick-walled container is provided with a movable stopper (stuck with a clamp), slowly inflating the container with an inflator , To increase the pressure inside the container. When the pressure inside the container increases to a certain extent, read out the thermometer’s indication, open the clamp, let the gas open the stopper, then read out the thermometer. Experiments can be observed, after the rubber stopper out of the mouth of the container, the thermometer showed significantly smaller number. The experimental setup is shown in Figure 1.