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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

What types of intermolecular forces are important in the liquid phase of (a) C2H6 and (b) (CH3)2CHOH?

(a)

Interpretation Introduction

Interpretation:

The intermolecular force present in C2H6 has to be determined.

Concept Introduction:

Intermolecular forces in a molecule are the important factor which is responsible for the physical changes of the molecule.

The intermolecular forces in gases are negligibly small and the forces are comparatively stronger in liquids and the intermolecular forces are highest in solids.

The stronger the intermolecular forces, closer will be the molecules in contact and thus higher will be the boiling point and melting point of the substance.

Three types of intermolecular forces:

  • London dispersion (Induced dipole-induced dipole forces)
  • Dipole-dipole
  • Hydrogen bonding
Explanation

Given the molecule: C2H6.

London dispersion forces(Induced dipole-induced dipole forces) are the intermolecular forces exist in all molecules regardless of structure and are due to the constant motion of electrons within molecules.

The strength of this force increases with increase in molecular weight and the amount of surface area available for the interaction between molecules

(b)

Interpretation Introduction

Interpretation:

The intermolecular force present liquid (CH3)2CHOH has to be determined.

Concept Introduction:

Intermolecular forces in a molecule are the important factor which is responsible for the physical changes of the molecule.

The intermolecular forces in gases are negligibly small and the forces are comparatively stronger in liquids and the intermolecular forces are highest in solids.

The stronger the intermolecular forces, closer will be the molecules in contact and thus higher will be the boiling point and melting point of the substance.

Three types of intermolecular forces:

  • London dispersion
  • Dipole-dipole
  • Hydrogen bonding

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