Question
A binary liquid solution is prepared by mixing $$n-$$heptane and ethanol. Which one of the following statements is correct regarding the behaviour of the solution?
A.
The solution is non-ideal, showing $$- ve$$ deviation from
Raoult’s Law.
B.
The solution is non-ideal, showing $$+ ve$$ deviation from
Raoult’s Law.
C.
$$n-$$heptane shows $$+ ve$$ deviation while ethanol shows
-ve deviation from Raoult’s Law.
D.
The solution formed is an ideal solution
Answer :
The solution is non-ideal, showing $$+ ve$$ deviation from
Raoult’s Law.
Solution :
For this solution intermolecular interactions between $$n$$ - heptane and ethanol are weaker than $$n$$ - heptane - $$n$$ - heptane & ethanol-ethanol interactions hence the solution of $$n$$ - heptane and ethanol is non-ideal and
shows positive deviation from Raoult’s law.