Intermolecular Forces and Liquids and Solids General Chemistry II CHM 112 Dr Erdal OnurhanSlide 1...
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Transcript of Intermolecular Forces and Liquids and Solids General Chemistry II CHM 112 Dr Erdal OnurhanSlide 1...
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
Intermolecular Forces and Liquids and Solids
General Chemistry II CHM 112 Dr Erdal Onurhan Slide 2
Phase Changes
Intermolecular Forces and Liquids and Solids
General Chemistry II CHM 112 Dr Erdal Onurhan Slide 3
Dipole-Dipole Forces
Intermolecular Forces and Liquids and Solids
General Chemistry II CHM 112 Dr Erdal Onurhan Slide 4
Ion-Dipole Forces
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
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.
Intermolecular Forces and Liquids and Solids
General Chemistry II CHM 112 Dr Erdal Onurhan Slide 7
Hydrogen Bonds in Water
Intermolecular Forces and Liquids and Solids
General Chemistry II CHM 112 Dr Erdal Onurhan Slide 8
Surface Tension
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
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
Intermolecular Forces and Liquids and Solids
General Chemistry II CHM 112 Dr Erdal Onurhan Slide 11
Seven Types of Units Cells – Seven Crystal Systems
Intermolecular Forces and Liquids and Solids
General Chemistry II CHM 112 Dr Erdal Onurhan Slide 12
Packing of Spheres – Simple Cubic Cell
Intermolecular Forces and Liquids and Solids
General Chemistry II CHM 112 Dr Erdal Onurhan Slide 13
Packing of Spheres – Body Centred Cubic Cell
Intermolecular Forces and Liquids and Solids
General Chemistry II CHM 112 Dr Erdal Onurhan Slide 14
Closest Packing – Two Arrangements
Intermolecular Forces and Liquids and Solids
General Chemistry II CHM 112 Dr Erdal Onurhan Slide 15
Cubic Unit Cells
Intermolecular Forces and Liquids and Solids
General Chemistry II CHM 112 Dr Erdal Onurhan Slide 16
Radii and Edge Length Relationships for Cubic Cell
Intermolecular Forces and Liquids and Solids
General Chemistry II CHM 112 Dr Erdal Onurhan Slide 17
X-Ray Diffraction
d
Intermolecular Forces and Liquids and Solids
General Chemistry II CHM 112 Dr Erdal Onurhan Slide 18
Crystal Structure of NaCl
Intermolecular Forces and Liquids and Solids
General Chemistry II CHM 112 Dr Erdal Onurhan Slide 19
Diamond and Graphite – Covalent Crystals
Intermolecular Forces and Liquids and Solids
General Chemistry II CHM 112 Dr Erdal Onurhan Slide 20
Properties of Crystals
Intermolecular Forces and Liquids and Solids
General Chemistry II CHM 112 Dr Erdal Onurhan Slide 21
Vapour Pressure
Intermolecular Forces and Liquids and Solids
General Chemistry II CHM 112 Dr Erdal Onurhan Slide 22
Vapour Pressure - Temperature
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)
Intermolecular Forces and Liquids and Solids
General Chemistry II CHM 112 Dr Erdal Onurhan Slide 24
Phase Diagrams