INTERMOLECULAR AND INTRAMOLECULAR ATTRACTION

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INTERMOLECULARAND INTRAMOLECULARATTRACTION
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OBJECTIVES

•   Recognize what types of attraction exist within
  a matter.
• Intermolecular attraction
• Intramolecular attraction
• Identify the difference between the two
  attraction.
• Identify different kinds of intramolecular
  attraction.
• Identify different kinds of intermolecular
  attraction.
• Application of the attraction.
• Be able to recognize what kind of attraction is
  affected when the liquid is boil.
• Be able to identify what attraction that is
  responsible for viscosity.
• Be able to recognize what kind of attraction that
  is affected when salt dissolves in water.
• Be able to recognize which liquid, water and
  alcohol, has the weakest intermolecular force.

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Review from last week

• Metals and Nonmetal element
• Difference between atom and molecule

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Metals and Nonmetal
Non Metal
METAL
Ex. Chloride (Cl) Oxygen (O)
Ex. Sodium (Na)
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Review from last week

• ATOM

• MOLECULE

Cl
Chloride
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Two kinds of force that keeps the matter intact

• Intermolecular Force
• Intramolecular Force

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What is Intramolecular Force

• Intra means WITHIN
• Attraction between two atoms.
• They are usual much stronger.
• Types of intramolecular force.
• Ionic bond (NaCl from salt)
• Covalent bond (HO from water)
• Metalloid (AgAg from gold jewels)

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Hydrogen Oxide (OH-)
H
O
H
Intramolecular Force (between two atom)
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Sodium Chloride

Cl
Na
Intramolecular Force (between two atom)
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What is Intermolecular Force

• Inter means BETWEEN
• Attraction between molecules.
• Very weak
• Examples of intermolecular force (attraction)
• Hydrogen bond
• Dipole-dipole bond
• Dispersal bond

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NaCl moleculeSalt
Cl
Cl
Na
Na
Intermolecular force (between molecule)
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Water
H
O
H
O
Intermolecular force (between molecule)
H
H
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Salt
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Water
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What happens when the water boils?

• Intermolecular attraction breaks.
• INTRAmolecular is not broken.

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What happens to the intermolecular force when the
honey is heated?

• It weakens the attraction.
• Viscosity will decrease.
• Temperature will increase.

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Which one has a strongest intermolecular force?

• Alcohol

• Water