A . The integral heat of solution of either components can not be calculated from heat of mixing data.
B . The average value of heat of neutralisation of dilute solutions of weak acids and bases is much less compared to that for strong acids and bases.
C . The standard heat of solution of the hydrate of a substance is the difference between the heat of solution of the anhydrous substance and its heat of hydration.
D . The accompanying enthalpy change, when a solute is dissolved in solvent, depends upon the nature & amount of the solute & the solvent, on the temperature & on the initial & final concentrations of the solution.
Answer: Option A Answer: (a).The integral heat of solution of either components can not be calculated from heat of mixing data.
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