Two dry solids --- barium hydroxide and ammonium nitrate --- are mixed to produce an endothermic reaction. The temperature of the mixture drops approximately 45oC and is cold enough to freeze the ...

The exothermic reaction is the crystallisation of sodium ethanoate, and the endothermic reaction is the reaction of barium hydroxide with ammonium chloride. Jon describes an easy way to remember ...

Two dry solids --- barium hydroxide and ammonium nitrate --- are mixed to produce an endothermic reaction. The temperature of the mixture drops approximately 45oC and is cold enough to freeze the ...