Question

(iii) Which of the following statements is correct for non-ideal
solutions?
a) For solutions showing positive deviation, AH mix is positive.
b) For solutions, showing negative deviations, the interactions
between the components are greater than pure components,
c) For solutions showing negative deviations, AVmix is positive but
Amix is negative.
d) For solutions showing negative deviations, AV mix and A Hmix are
positive.
20mm of Hg at 300 K​

Answer 1

Answer:

answer (d) for solutions showing negative deviations

Answer 2

NON IDEAL SOLUTIONS

The statement correct for non- ideal solutions is (A) For solutions showing positive deviation, AH mix is positive.

GETTING TO KNOW MORE ABOUT NON IDEAL SOLUTIONS:

* A non-ideal solution is one that does not follow Raoult's law over all concentration and temperature ranges. A non-ideal solution may deviate from Raoult's rule in either a positive or negative way. For non-ideal solutions, Hmix and Vmix are not equal to zero.

* The total vapor pressure estimated using Raoult's equation is greater in this case. Solute-solvent (A-B) interactions are weaker than pure component interactions (A-A or B-B). The Hmix and Vmix values are both positive. Examples include ethanol and acetone, carbon disulfide and acetone, acetone and benzene, and so forth.

*The total vapor pressure estimated using Raoult's equation is lower in this case. The interaction between the solute and the solvent (A-B) is more powerful than the interaction between pure components (A-A or B-B). Hmix and Vmix are both negative.