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Enthapy of solution (Delta(Sol) H^(@)) o...

Enthapy of solution `(Delta_(Sol) H^(@))` of a solute is the enthalpy change when one mole of it dissolves in ______of solvent

A

excess

B

an unknown amount

C

a specified amount

D

an infinite amount

Text Solution

Verified by Experts

The correct Answer is:
C
It is also called the integral of solution. The heat of solution (also called the enthalpy of solution), `Delta_("Soln") H^(@)`, is the heat generated or absorbed when one mole of solute dissolves in a specific amount of solvent at 1 bar pressure and specified temperature. The quantity `Delta_("Soln") H^(@)` represents the difference between the enthalpy of the final solution and the enthalpies of its original components (that is, solute and solvent) before they are mixed
`Delta_(Soln) H^(@) = H_(Soln)^(@) - H_("components")`
Neither `H_("Soln")^(@)` nor `H_("components")^(@)` can be measured, but their difference, `Delta_("Soln") H^(@)`, is positive for endothermic (heatabsorbing) process and negative for exothermic (heat-generating) process.
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