**Understanding Endothermic Steps in the Dissolution Process**In the dissolution process, certain steps are endothermic, meaning they absorb energy. Here’s a guide to identifying these steps:- **Form solute-solute attractions:** This step is not endothermic.- **Break solute-solute attractions:** This step involves breaking bonds between solute molecules and is usually endothermic.- **Break solute-solvent attractions:** This step is not typical and generally does not apply.- **Form solute-solvent attractions:** This process involves forming new bonds between the solute and solvent and is exothermic, releasing energy. *(This option is checked and should not be selected as endothermic.)*- **Break solvent-solvent attractions:** This step involves breaking interactions between solvent molecules and is typically endothermic.Understanding these steps helps in comprehending how energy changes during the dissolution process.

When a solute is dissolved in a solvent, it results in the formation of a solution. A "solvent" is a liquid that dissolves a substance known as a solute. Solubility refers to the maximum amount of solute dissolved in a solvent at a particular temperature. The solubility is impacted by various factors that include: Solute concentration Temperature Pressure Solute and solvent polarity An endothermic reaction is a process in which energy is absorbed as heat and enthalpy change is positive. Dissolution is a 3 step process in which steps 1 and 2 are endothermic whereas step 3 is exothermic. Separation of solute particles by breaking bonds within the solutes Separation of solvent particles by breaking hydrogen bond between solvents Formation of solute-solvent bonds in order to form a solution. Hence, the second and the fifth options are correct. The first option is incorrect because the solute-solute formation is not a part of dissolution and is exothermic. The third option is incorrect because breaking solute-solvent bonding is not a part of dissolution. The fourth option is incorrect because forming a bond between solute and solvent is exothermic, not endothermic.