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← ScienceWhich consequence results when rapid hydration of solid anhydrous calcium chloride (CaCl2) occurs?
A)Exothermic heat release raises solution temperature✓
B)Endothermic absorption cools the solution
C)Volume contraction decreases chemical potential
D)Vapor pressure elevation stabilizes hydration layers
💡 Explanation
The high lattice energy broken during dissolution triggers a very exothermic reaction via ion-dipole interactions. Because hydration enthalpy is highly negative, heat is released, raising the solution temperature, therefore favoring dissolution of other ionic compounds rather than cooling.
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