when solute is dissolved then the particles of solute make their way into the solvent particles and it becomes soluble then why the energy is released? when the vapour pressure becomes higher it exerts force on the wall of the container then why it becomes minimum when solute is added

Asked by Gaurav Avhad | 22nd Oct, 2010, 02:44: PM

Expert Answer:

when solute is dissolved then the particles of solute make their way into the solvent particles and it becomes soluble then the energy is released beacuse Solubility is a balance between hydration enthalpy and lattice enthalpy. energy released during hydration is the energy used when breaking the ionic bond (lattice enthalpy). This is a simultaneous process that occurs. Lattice enthalpy will be equal to or less than hydration enthalpy of that compound if it is soluble.
 
when the vapour pressure becomes higher it exerts force on the wall of the container then it becomes minimum when solute is added because of the developement of the good bonding between solute and solvent and which makes the intermolecular force of attraction high and volatility becomes low.

Answered by  | 22nd Oct, 2010, 10:34: PM

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