Intermolecular Forces and Liquids and Solids General Chemistry II CHM 112 Dr Erdal OnurhanSlide 1...

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Intermolecular Forces and Liquids and Solids General Chemistry II CHM 112 Dr Erdal Onurhan Slide 1 Property\State Gas Liquid Solid Intermolecular Interaction Virtually none Considerable interaction Considerable interaction Flow Fluid – free flow Fluid – nearly free flow Rigid – virtually none Actual/Occupied Volume Ratio Close to Negligible Slightly<1.00 Slightly<1.00 Mode of Motion Virtually random translational motion Restricted translational motion Vibration about fixed sites only Simple Equation of State Yes No No Comparison of Gases, Liquids and Solids

Transcript of Intermolecular Forces and Liquids and Solids General Chemistry II CHM 112 Dr Erdal OnurhanSlide 1...

Page 1: Intermolecular Forces and Liquids and Solids General Chemistry II CHM 112 Dr Erdal OnurhanSlide 1 Property\StateGasLiquidSolid Intermolecular Interaction.

Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 1

Property\State Gas Liquid Solid

Intermolecular Interaction Virtually none Considerable interaction Considerable interaction

Flow Fluid – free flow Fluid – nearly free flow Rigid – virtually none

Actual/Occupied Volume Ratio Close to Negligible Slightly<1.00 Slightly<1.00

Mode of Motion Virtually random translational motion

Restricted translational motion

Vibration about fixed sites only

Simple Equation of State Yes No No

Comparison of Gases, Liquids and Solids

Page 2: Intermolecular Forces and Liquids and Solids General Chemistry II CHM 112 Dr Erdal OnurhanSlide 1 Property\StateGasLiquidSolid Intermolecular Interaction.

Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 2

Phase Changes

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Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 3

Dipole-Dipole Forces

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Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 4

Ion-Dipole Forces

Page 5: Intermolecular Forces and Liquids and Solids General Chemistry II CHM 112 Dr Erdal OnurhanSlide 1 Property\StateGasLiquidSolid Intermolecular Interaction.

Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 5

Formation of Induced Dipole in a Helium Atom

No induction in (a), since there are no ions or polar molecules in close proximity.

Induction in (b) doe to presence of near ion or polar molecule

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Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 6

Induced Dipoles in Helium

The indcued dipoles exist only momentarily. Nevertheless, at low enough temperatures, the generated disperion forces are sufficient for helium to condense.

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Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 7

Hydrogen Bonds in Water

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Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 8

Surface Tension

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Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 9

Capillary Action

(a) Adhesion is higher (b) Cohesion is higher

Page 10: Intermolecular Forces and Liquids and Solids General Chemistry II CHM 112 Dr Erdal OnurhanSlide 1 Property\StateGasLiquidSolid Intermolecular Interaction.

Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 10

Unit Cell and 3-D Depiction

Unit Cell 3-D Structure

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Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 11

Seven Types of Units Cells – Seven Crystal Systems

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Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 12

Packing of Spheres – Simple Cubic Cell

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Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 13

Packing of Spheres – Body Centred Cubic Cell

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Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 14

Closest Packing – Two Arrangements

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Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 15

Cubic Unit Cells

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Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 16

Radii and Edge Length Relationships for Cubic Cell

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Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 17

X-Ray Diffraction

d

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General Chemistry II CHM 112 Dr Erdal Onurhan Slide 18

Crystal Structure of NaCl

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Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 19

Diamond and Graphite – Covalent Crystals

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General Chemistry II CHM 112 Dr Erdal Onurhan Slide 20

Properties of Crystals

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General Chemistry II CHM 112 Dr Erdal Onurhan Slide 21

Vapour Pressure

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Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 22

Vapour Pressure - Temperature

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Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 23

A Typical Heating CurveT

emp

erat

ure

Time

solid solid+liquid liquid liquid+vapour vapour

temperature rise

melting temperature rise

temperature rise

vaporisation

Tm

Tb

mH bH

(Energy added at constant rate)

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Intermolecular Forces and Liquids and Solids

General Chemistry II CHM 112 Dr Erdal Onurhan Slide 24

Phase Diagrams