Flexi Says: The chemical reaction that occurs when you mix baking soda and vinegar together is an endothermic reaction. Baking soda reacts with the vinegar to produce carbon dioxide gas, sodium acetate, and water. If you measure the temperature of vinegar before adding baking soda, and continue measuring the temperature at regular intervals after adding baking soda, you should observe a decrease in temperature. This indicates that more energy was used to break the bonds of the reactants than was released when the products were formed.
