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Direct linkMacedone, Jeffrey H.; Gee, Kent L.; Vernon, Julia A. – Journal of Chemical Education, 2014
Chemical demonstrations are an integral part of the process of how students construct meaning from chemical principles, but may introduce risks to students and presenters. Some demonstrations are known to be extremely loud and present auditory hazards; little has been done to assess the risks to educators and students. Using laboratory-grade…
Descriptors: Science Instruction, Chemistry, Demonstrations (Educational), Science Laboratories
Gee, Kent L.; Vernon, Julia A.; Macedone, Jeffrey H. – Journal of Chemical Education, 2010
Although hydrogen-oxygen balloon explosions are popular demonstrations, the acoustic impulse created poses a hearing damage risk if the peak level exceeds 140 dB at the listener's ear. The results of acoustical measurements of hydrogen-oxygen balloons of varying volume and oxygen content are described. It is shown that hydrogen balloons may be…
Descriptors: Chemistry, Hearing Impairments, Acoustics, Risk
