Redox and electrochemistry > energy changes

Students add powdered or finely-divided metals to a copper(II) sulfate solution and measure the 

Students add powdered or finely-divided metals to hydrochloric 

A solution of sodium chlorate(I) oxidises an aqueous solution of luminol (3-aminophthalhydrazide). The reaction gives out a blue chemiluminescent glow without any increase in temperature of the mixture.