First order processes are of paramount importance for chemical kinetics. In a well-established demonstration experiment, the flow of water out of a vertical glass tube through a capillary simulates a chemical first order process. Here, a digital version of this experiment for lecture hall demonstrations is presented. To this end, water flowing out of the capillary is collected in a beaker which stands on an electronic scale interfaced with a computer. The computer generates a plot of the data in real time which is projected during the lecture. Hereby, with proper explanations, a very intuitive grasp of the essence of first order processes is obtained: The rate (represented by the water flow) is proportional to the concentration of the reactant (height of the water column). With a modified setup, consecutive first order kinetics as well as the concept of a rate-limiting step are illustrated.

中文翻译：

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通过毛细流动和简单的数据采集可视化一阶动力学

一阶过程对于化学动力学至关重要。在一个完善的演示实验中，水从垂直玻璃管通过毛细管流出的过程模拟了化学一级过程。在此，展示了此实验的数字版本，用于演讲厅演示。为此，从毛细管流出的水被收集在一个烧杯中，该烧杯位于与计算机连接的电子秤上。计算机实时生成数据图，该数据图是在授课过程中投影的。因此，通过适当的解释，可以非常直观地掌握一阶过程的本质：速率（由水流表示）与反应物的浓度（水柱的高度）成正比。使用修改后的设置，