Chemistry is truly the central science and underpins much of the efforts of scientists and engineers to improve life for humankind. TheMIT Department of Chemistryis taking a leading role in discovering new chemical synthesis, catalysis, creating sustainable energy, theoretical and experimental understanding of chemistry, improving the environment, detecting and curing disease, developing materials new properties, and nanoscience.
The Chemistry Education Office staff is responsible for administering the educational programs in the Department of Chemistry. Students can find answers to many questions about the undergraduate and graduate programs on the department website, and they are encouraged to stop by and see the staff in the office located in 6-205.
The student-run outreach programs in the Department of Chemistry aim to bring the excitement of chemical sciences to the community through lively demonstrations designed to illustrate a broad range of chemical principles. Graduate students visit science classes in high schools and middle schools in the Greater Boston area with a view to demystifying chemistry through hands-on experiments. ClubChem, an undergraduate chemistry organization, conducts Chemistry Magic Shows for elementary schools and youth programs in the Greater Boston area.
Chemistry is truly the central science and underpins much of the efforts of scientists and engineers to improve life for humankind. MIT Chemistry is taking a leading role in discovering new chemical synthesis, catalysis, creating sustainable energy, theoretical and experimental understanding of chemistry at its most fundamental level, unraveling the biochemical complexities of natural systems, improving the environment, detecting and curing disease, developing materials new properties, and nanoscience.
The noise level from exploding chemical demonstrations and the effect they could have on audiences, especially young children, needs attention. Auditory risk from H2–O2 balloon explosions have been studied, but no studies have been done on H2–air “egg-splosions”. The peak sound pressure level (SPL) was measured for the first time and compared to the recommended SPL limits and some recently published work. All peak SPL results ended above 125 dB, some greater than 150 dB. The SPL results exceeded the World Health Organization (WHO) safe limits of 120 dB for children and 140 dB for adults.
Abstract: The term “egg-splosion” refers to collecting hydrogen (H2) gas in a hollowed out egg, and combusting the collected gas. For the production of H2 gas, this demonstration relies on the oxidation of mossy zinc (Zn) by hydrochloric acid (HCl). The reaction forms zinc chloride (ZnCl2) and releases hydrogen (H2).
This paper presents the peak sound pressure level (SPL) results for exploding hydrogen–air (H2–air) eggs. Studies on the auditory risk on exploding H2–O2 balloons and on other chemical demonstrations have been published.(1-5) Until now, no documented studies exist on the peak SPL levels for the “egg-splosion”, although the demonstration is widely published and performed.