This is a Thermite reaction that can be done safely indoors. The rust (Fe2O3) reacts with the aluminum foil (Al) to produce aluminum oxide (Al2O3), elemental iron (Fe) and heat. This reaction is a highly exothermic, single replacement reaction. Aluminum is oxidized and iron is reduced. The melting point of iron is 1530°C and the reaction temperature reaches approximately 2200 °C. (Thermal Energy released is ΔH° = –849 kJ/mole).
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GET EXCITED WITH ELECTRICITY! OJ POWERED CLOCK INQUIRY
Categories: General Interest, Teacher Demonstration
Students watch the teacher demonstrate the OJ powered clock. The teacher guides students to wonder what they could change to make the clock work. They do some brainstorming and then the next period,... read more
Student Activity/Teacher Demo: Spinning Dish
Categories: Lab/Student Activity, Teacher Demonstration
In this demo, two polyethylene strips are charged on one end by rubbing with wool. One charged strip is then mounted on an evaporating dish and the other charged strip is used to make the dish spin.... read more
Teacher Demo: Respiration in Yeast
Categories: Teacher Demonstration
This demonstration shows that the combination of yeast, sugar and water will produce a gas that can be collected. This provides students with an opportunity to draw on prior knowledge to identify the... read more