The given molecules in order of the increasing surface tension at a given temperature are to be ranked. Concept introduction: The molecules on the surface and bulk experience different intermolecular forces. The molecule in bulk is surrounded by the molecules from all sides. Therefore the net force on the molecules is zero. On the other hand, molecules on the surface have molecules only below them so the net attractive force experienced by them is in downward direction. Due to the net attractive forces, the surface molecules will try to move into the bulk and surface area decreases. Surface tension is the energy that is needed to raise the surface area by a given amount. The unit of surface tension is J/m 2 . Surface tension is directly related to the intermolecular forces and therefore increases with increase in the intermolecular forces.

Question

We learned four factors (ARIO) for comparing the relative acidity of compounds. When two of these factors are in competition, the order of priority is the order in which these factors were covered ("atom" being the most important factor and "orbital" being the least important). However, we also mentioned that there are exceptions to this order of priority. Compare the two compounds and identify the exception. OH PK-4.75 SH PK-10.6 5. "Resonance" is more important than "atom" because the conjugate base of first compound is more stable than the second. "Atom" is more important than "resonance" because the conjugate base of first compound is more stable than the second. "Resonance" is more important than "atom" because the conjugate base of second compound is more stable than the first. "Atom" is more important than "resonance" because the conjugate base of second compound is more stable than the first.

Answer 1

Question

Chapter 12, Problem 12.63P

Interpretation Introduction

Interpretation:

The given molecules in order of the increasing surface tension at a given temperature are to be ranked.

Concept introduction:

The molecules on the surface and bulk experience different intermolecular forces. The molecule in bulk is surrounded by the molecules from all sides. Therefore the net force on the molecules is zero. On the other hand, molecules on the surface have molecules only below them so the net attractive force experienced by them is in downward direction.

Due to the net attractive forces, the surface molecules will try to move into the bulk and surface area decreases.

Surface tension is the energy that is needed to raise the surface area by a given amount. The unit of surface tension is J/m2. Surface tension is directly related to the intermolecular forces and therefore increases with increase in the intermolecular forces.

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