# When baking soda and vinegar combine to form sodium acetate and carbon dioxide, energy is absorbed from the surroundings and the solution gets colder What type of reaction is this?

NaHCO_3(aq) + H_3C-CO_2H +Delta rarr Na^+""^(-)O_2C-CH_3+CO_2(g)uarr+H_2O
This is clearly an endothermic reaction, as it absorbs heat from the surroundings. Energy is expended to break the strongish $O - H$ bond of acetic acid. .