A demonstration experiment for studying the properties of saturated vapor

Гребенев, И. В.; Лебедева, О. В.; Polushkina, Svetlana V

doi:10.1088/1361-6552/aa8739

Cited by 1 publication

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“…Saturated vapour is one of the most interesting and difficult research objects in secondary and higher school physics courses. In the previous article, we proposed several experiments to study the properties of saturated vapour [1]. The proposed experiment is called the vapour Cartesian diver, because it is an extension of a simpler device, a simple Cartesian diver, which is based on the property of a gas to change volume when the plastic bottle is compressed and the pressure changes (figure 1) [2,3].…”

Section: Introductionmentioning

confidence: 99%

Vapor Cartesian diver

2018

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The article proposes a new research object for a general physics course-the vapour Cartesian diver, designed to study the properties of saturated water vapour. Physics education puts great importance on the study of the saturated vapour state, as it is related to many fundamental laws and theories. For example, the temperature dependence of the saturated water vapour pressure allows the teacher to demonstrate the Le Chatelier's principle: increasing the temperature of a system in a dynamic equilibrium favours the endothermic change. That means that increasing the temperature increases the amount of vapour present, and so increases the saturated vapour pressure. The experimental setup proposed in this paper can be used as an example of an auto-oscillatory system, based on the properties of saturated vapour. The article describes a mathematical model of physical processes that occur in the experiment, and proposes a numerical solution method for the acquired system of equations. It shows that the results of numerical simulation coincide with the self-oscillation parameters from the real experiment. The proposed installation can also be considered as a model of a thermal engine.

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Section: Introductionmentioning

confidence: 99%