Hydration Energy — Definition, Formula, Properties & Uses | AllChemicals | AllChemicals

What is Hydration Energy?

Hydration energy (enthalpy of hydration) is the energy released when gaseous ions are surrounded by water molecules to form aqueous ions, reflecting the strength of ion-dipole interactions between the ion and water. It is always exothermic and increases with increasing charge density of the ion (higher charge and smaller ionic radius). Hydration energy plays a critical role in determining the solubility of ionic compounds, since dissolution is favorable when the sum of hydration energies exceeds the lattice energy.

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Term Hydration Energy

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What is Hydration Energy?

Hydration energy (enthalpy of hydration) is the energy released when gaseous ions are surrounded by water molecules to form aqueous ions, reflecting the strength of ion-dipole interactions between the ion and water. It is always exothermic and increases with increasing charge density of the ion (higher charge and smaller ionic radius). Hydration energy plays a critical role in determining the solubility of ionic compounds, since dissolution is favorable when the sum of hydration energies exceeds the lattice energy.

More "H" Terms

Haber Process N₂ + 3H₂ ⇌ 2NH₃ | ΔH = −92 kJ/mol Hafnium Hf Half Cell Half Life Half-Cell E = E° − (RT/nF)lnQ Half-Life A(t) = A₀e^(−λt); t½ = ln2/λ Half-Reaction Halide X⁻ (e.g., F⁻, Cl⁻, Br⁻, I⁻) Halogen F₂, Cl₂, Br₂, I₂, At; Group 17; ns²np⁵ valence configuration Halogenation C-X + Cl₂/Br₂ (hv or AlCl₃) → C-X(halogen); EAS or radical pathway Halogens Hard Acid Hard acid: small, highly charged, low polarisability (e.g., H⁺, Mg²⁺, Al³⁺)

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