The reason for the 12 times more viscous nature of pentanol as compared to hexane is to be determined. Concept introduction: Intermolecular forces operate between the molecules so changes with change in the phase and effects with physical properties of the substance. In intermolecular forces, the bond is formed between two molecules with partial charges that are present relatively far away from each other. Viscosity is the quantity that determines the resistance of the liquid to flow. Both liquids and gases can flow but gases have high viscosity than liquids. Viscosity is directly related to the intermolecular forces and therefore increases with increase in the intermolecular forces. The increasing order of strength is as follows: dispersion forces < dipole − dipole forces < hydrogen bonds < ion − dipole forces

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Chapter 12, Problem 12.69P

Interpretation Introduction

Interpretation:

The reason for the 12 times more viscous nature of pentanol as compared to hexane is to be determined.

Concept introduction:

Intermolecular forces operate between the molecules so changes with change in the phase and effects with physical properties of the substance. In intermolecular forces, the bond is formed between two molecules with partial charges that are present relatively far away from each other.

Viscosity is the quantity that determines the resistance of the liquid to flow. Both liquids and gases can flow but gases have high viscosity than liquids. Viscosity is directly related to the intermolecular forces and therefore increases with increase in the intermolecular forces. The increasing order of strength is as follows:

dispersion forces<dipole−dipole forces<hydrogen bonds<ion−dipole forces

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