can you answer on the blank please thanks alot Problem 13.21 very similar differ
ID: 1042970 • Letter: C
Question
can you answer on the blank please
thanks alot
Explanation / Answer
First let's answer the blanks:
DeltaHsoln is determined by the relative magnitude of the "old" solute-solute (DeltaHsolute ) and solvent-solvent (DeltaHsolvent) interactions and the new solute-solvent (DeltaHmix) interaction. Because the solute and solvent in this case experience very similar London dispersion forces, the energy required to seprate them individually and the energy released when they are mixed are approximately equal.
Explanation: try to imagine before mixing and after mixing senarios: befor mixing there was solute-solute and solvent-solvent interactions present. Hence first two blank places are field with solute-solute (DeltaHsolute ) and solvent-solvent (DeltaHsolvent) terms. After mixing there is solvent-solute interaction is present predominantly and hence thired blank is field with solute-solvent (DeltaHmix).
Pentane and hexane both are hydrocarbons just differing with one CH2. Hence they are very similar in nature and will experiance very similar london force of dispersion. They are not ionic or polar compound ans so ion-dipole forces and diole-dipole forces are absent. Only force present is Londone dispersion force. Hence at fourth and fifth blank place is field with very similar London dispersion forces.
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