How can you say that the dissolution of the given salt in water is an endothermic or exothermic reaction
Answers
Explanation:
When you add a solute to a solvent, you are reducing the solvent-solvent interactions, and adding solute-solvent interactions. If the solute-solvent interactions are really favorable compared to the solvent-solvent interactions, the process is exothermic.
This is determined by a bunch of factors. For instance, dissolving calcium salts in water is typically very exothermic because the calcium ion is relatively small and has a charge of +2, enabling very, very strong interactions with the negative end of water molecules. These release a lot of energy when they form which winds up as heat. On the other end of the scale, you have ammonium cations, (NH4+) which are relatively large. They form okay interactions with water molecules, but because of their size and shape they bust up a lot of favorable water-water interactions, which takes a lot of energy. Thus, it's endothermic to dissolve most ammonium salts in water.
(However, there are always exceptions - NaCl’s dissolution in water is endothermic. Not all metals form salts whose dissolution is exothermic. Calcium can be regarded as an exception to this too).
HOPE IT HELPS YOU,,
¶ THANK YOU ¶
PLEASE MARK AS BRAINLIEST ..