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Tribonucleation: A New Mechanism for Generating the Soda Geyser
Journal of Chemical Education ( IF 2.5 ) Pub Date : 2018-06-01 00:00:00 , DOI: 10.1021/acs.jchemed.8b00127
Thomas S. Kuntzleman 1 , Michael W. Nydegger 1 , Brooke Shadley 1 , Ninad Doctor 2 , Dean J. Campbell 3
Affiliation  

Observations of the rapid release of CO2 from carbonated beverages, also known as sodas, provide a rich assortment of experiments for chemical educators and their students to explore. For example, dropping Mentos candies into a freshly opened bottle of soda creates a fountain that can jet several meters into the air. The fountain is generated by rapid formation of CO2(g) bubbles on innumerable nucleation sites that exist on the rough surface of the candies. Interestingly, it is possible to create fountains of moderate height by dropping smooth objects into bottles of soda. Exploration of how smooth objects create such fountains provides new classroom demonstrations, laboratory experiments, and inquiry-based projects that can be tied to topics that include kinetics, density, and gas solubility.

中文翻译:

Tribonucleation:生成苏打水的新机制

从碳酸饮料(也称为苏打水)中迅速释放出CO 2的观察结果为化学教育工作者及其学生提供了丰富的实验机会。例如,将Mentos糖果滴入刚打开的苏打水瓶中,就可以创建一个可以向空中喷射数米的喷泉。源于CO 2的快速生成(g)在糖果的粗糙表面上存在的无数成核位置上的气泡。有趣的是,可以通过将光滑的物体放入汽水瓶中来创建中等高度的喷泉。探索光滑物体如何创建此类喷泉提供了新的课堂演示,实验室实验和基于询问的项目,这些项目可以与动力学,密度和气体溶解度等主题相关联。
更新日期:2018-06-01
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