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NEETChemistryThermodynamics (C)

Why is the solubility of most salts in water temperature-dependent?

Options

  1. ABecause water molecules form stronger bonds at higher temperatures.
  2. BBecause the enthalpy of solution (∆ sol H) is negative at higher temperatures.
  3. CBecause the lattice enthalpy decreases with rising temperature.
  4. DBecause the dissociation process of salts is endothermic, and higher temperatures provide the necessary energy

Correct answer

D. Because the dissociation process of salts is endothermic, and higher temperatures provide the necessary energy

Step-by-step solution

The solubility of most salts in water increases with rising temperature because the dissolution process is endothermic, requiring the input of energy, which is provided by higher temperatures.

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