Placing solid ammonium nitrate, NH4NO3, in a container of water causes an endothermic reaction. The result is ammonium hydroxide, NH4OH, and nitric acid, HNO3. Which diagram shows the correct equation for the reaction?
NH4NO3 + H2O + energy → NH₄OH + HNO₃
This equation accurately represents the endothermic reaction where solid ammonium nitrate dissolves in water, absorbing energy to produce ammonium hydroxide and nitric acid.
This choice suggests a reaction where ammonium hydroxide and nitric acid combine to form ammonium nitrate, which is incorrect. The equation does not depict the dissolution of ammonium nitrate in water, nor does it reflect the endothermic nature of the original reaction.
This is the correct representation of the reaction. It shows ammonium nitrate reacting with water, absorbing energy, and yielding ammonium hydroxide and nitric acid, consistent with the described endothermic process.
This option implies that energy is released during the reaction, which contradicts the endothermic nature of the process. An endothermic reaction absorbs energy, so the equation should indicate that energy is a reactant, not a product.
This choice describes a reaction where ammonium hydroxide and nitric acid produce ammonium nitrate and water, which is not the scenario presented. It incorrectly suggests an exothermic reaction rather than the dissolution and reaction of ammonium nitrate in water.
The reaction of solid ammonium nitrate with water is an endothermic process that forms ammonium hydroxide and nitric acid while absorbing energy. The correct equation, represented as NH4NO3 + H2O + energy → NH₄OH + HNO₃, captures the essence of this reaction. The other choices either misrepresent the direction of the reaction or inaccurately depict energy changes, highlighting the importance of understanding endothermic reactions in chemical processes.
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