You're asking about the enthalpy change of dissolving ammonium nitrate (NH₄NO₃) in water, not an "energy factor." Enthalpy change refers to the heat absorbed or released during a chemical or physical process.

Here's why:

* Endothermic vs. Exothermic: Dissolving ammonium nitrate in water is an endothermic process. This means that heat is absorbed from the surroundings, making the solution feel cold.

* Enthalpy Change (ΔH): The enthalpy change for dissolving ammonium nitrate in water is positive. A positive ΔH indicates an endothermic reaction.

* Factors Affecting Enthalpy Change: The enthalpy change of dissolving ammonium nitrate in water is influenced by:

* Lattice energy: The energy holding the ions together in the solid ammonium nitrate.

* Hydration energy: The energy released when the ions are surrounded by water molecules.

Calculating the Enthalpy Change:

You can find the enthalpy change of dissolving ammonium nitrate in water experimentally or look it up in a reference table.

Note: It's important to distinguish between "enthalpy change" and "energy factor." The enthalpy change quantifies the heat flow, while "energy factor" is a less specific term that may have different meanings in different contexts.