Experimental instrument for the physical adiabatic compression and expansion using the transparent PET bottle

摘要

The present invention relates to an adiabatic compression expansion test aid using a transparent PET bottle.;Adiabatic compression and expansion, one of the laws of conservation of thermodynamics in physics, are difficult for elementary and secondary students to understand complex theories. Therefore, by using the syringe to observe the phenomenon of the expansion and contraction of the object inside the piston compression and expansion of the syringe. In this experiment, elementary and junior high school students do not observe the pressure of the piston's pulling and pushing force up and down or the phase change phenomenon of the internal object, and has a disadvantage in that various tools must be prepared to understand various phenomena.;The present invention installs a check valve on the lid of a transparent PET bottle and a fastening mechanism on the upper end of the conduit connected to the check valve, so that a high pressure and low pressure state can be arbitrarily formed inside by a pumping tool such as a syringe.;PET bottles, which are often discarded around, can be used to visually confirm accurate experiments of adiabatic compression expansion without additional effort or cost. It can be.