Describe the enthalpy changes during the dissolving of KBr into C 2 H 6 A. The e

Question

Describe the enthalpy changes during the dissolving of KBr into C2H6

A. The enthalpy of separating the solute is highly endothermic; the enthalpy of separating the solvent is slightly endothermic; the enthalpy of mixing is slightly exothermic; the enthalpy of solution is highly endothermic. B. The enthalpy of separating the solute is slightly endothermic; the enthalpy of separating the solvent is highly endothermic; the enthalpy of mixing is slightly exothermic; the enthalpy of solution is highly endothermic. C. The enthalpy of separating the solute is highly endothermic; the enthalpy of separating the solvent is slightly endothermic; the enthalpy of mixing is highly exothermic; the enthalpy of solution is slightly endothermic. D. The enthalpy of separating the solute is slightly endothermic; the enthalpy of separating the solvent is slightly endothermic; the enthalpy of mixing is highly exothermic; the enthalpy of solution is highly exothermic.

Explanation / Answer

Since, KBr is a strong ionic salt -> Enthalapy of separation of salt is highly endothermic

and as, Ethane(C2H6) is a polar compund usually gas at room temperature, Thus the Enthalapy of separation of Ethane is Slightly endothermic,

Since we just need to put the solute in the gas chamber of solvent here the enthalapy of mixing is also slightly endothermic

And hence we can say the solution is highly endothermic (Stronger bonds are broken to form weaker bonds as ionic salt is broken to form polar bond)

Thus the answer is A

The solution is a weak solution held by H-Bonds thus the

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