It is important to recognize that exothermic does NOT mean hot (although exothermic things often feel hot) and that endothermic does NOT mean cold. Mix 2ml of boiling/very hot water for every 3g of sodium acetate anhydrate. Question: Is The Dissolution Of Sodium Acetate In Water An Exothermic Or Endothermic Process? Because it produces new compounds - Sodium acetate, Water and Carbon dioxide. Crystallized sodium acetate is an irritant to the skin. When substances dissolve, the process can be either exothermic (ΔH soln < 0) or endothermic ... A similar product based on the precipitation of sodium acetate, not its dissolution, is marketed as a reusable hand warmer (Figure 9.5.1). Explain your answer. Yes, it is a Chemical change, and endothermic reaction. The baking soda and vinegar are called the reactants. Sodium acetate anhydrate, however, needs to be mixed with water before it can be used for hot ice. exothermic reactions and positive for endothermic reactions. When the pack is squeezed, the water bag bursts and the water dissolves the sodium acetate. Sorry I didnt know you wanted in in "thermodynamics" so you should know that the chemical bonds are broken heat is released so the reaction is exothermic, and in the case of Ammonium Nitrate, endothermic, as when you dissolve the Ammonium Nitrate in water energy (heat) is requires about 26KJ/mol, sodium acetate(aq) ==> sodium acetate(s); Disposal: The materials in this demonstration can be reused. View Copy of Copy of Determining endo- vs exothermic reactions.docx from CHEMISTRY 325 at Middlesex County College. Safety: Wear proper protective equipment including gloves and safety glasses when preparing and performing this demonstration. That is, it requires the addition of heat. acetic acid + sodium bicarbonate sodium acetate + water + carbon dioxide gas Step 1: Add approximately 5 ml of acetic acid to a large test tube. ... one of the terms-exothermic or endothermic in your explanation). Avoid prolonged contact with the flask as solutions are hot enough to cause burns. Classifying a chemical reaction as exothermic or endothermic is simple. The sodium acetate, water, and carbon dioxide that are formed are called the products. This process takes in heat (from you). This means the hand warmer could be reset by heating it (1 mark). exothermic. Step 3: Add a small scoop of sodium bicarbonate to the acetic acid. If you take a lump of solid sodium acetate and add it to a beaker of water, the water will get colder. At high temperatures, sodium acetate forms a highly concentrated aqueous solution. (2 marks) The conversion of sodium acetate trihydrate solution to solid sodium acetate trihydrate is exothermic, so the reverse reaction (the conversion of solid sodium acetate trihydrate back to sodium acetate trihydrate solution) must be endothermic (1 mark). Name_ _ 1. 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