Iron oxide, aluminum, and a catalyst are placed in a flowerpot. The reaction is extremely exothermic resulting in molten iron and aluminum dripping into sand below the flowerpot. The demonstration ...

Catalysts are useful because they do not get used up during a reaction. Exothermic and endothermic reactions Exothermic reactions release energy into the surroundings, so they usually feel hot.

Temperature, concentration, pressure and the use of catalysts affect reaction rate. Heat energy changes in chemical reactions - Edexcel Exothermic reactions in solution give out energy and the ...