Why chemistry why again
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Why chemistry, why again? PowerPoint PPT Presentation


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Why chemistry, why again?. You are made up of biomolecules! Your biomolecules are built from food you eat Your body breaks them down and rearranges them to give you: Energy and Building blocks for proteins, carbohydrates, lipids and Nucleic acids (DNA, RNA). You are what you eat!.

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Why chemistry, why again?

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Why chemistry why again

Why chemistry, why again?


You are what you eat

  • You are made up of biomolecules!

  • Your biomolecules are built from food you eat

  • Your body breaks them down and rearranges them to give you:

    • Energyand

    • Building blocks for

      • proteins,

      • carbohydrates,

      • lipids and

      • Nucleic acids (DNA, RNA)

You are what you eat!


What do you eat

What do you eat?


A mixture of biomolecules

  • Carbohydrates (sugar and starch)

  • Protein

  • Lipids – (fats, oils, cholesterol)

  • Vitamins

  • Minerals (Ca, PO4-2, Se, Fe, Ni, Zn, etc)

  • H2O

    and

  • Energy (stored in chemical bonds)

a mixture of biomolecules


Let s review the basics atoms

Let’s review the basics - atoms

* phospholipids

** some proteins


Atomic structure

Atomic Structure

  • Protons

  • Electrons

  • Neutrons


Valence electrons anyone

Valence Electrons Anyone?

  • What are they?

  • How do I figure out how many an atom has?

  • How do I figure out how many an ion has?


The ultimate graphic organizer

The Ultimate Graphic Organizer


Why chemistry why again

Molecular

Forces

Intramolecular

Forces

Intermolecular

Forces

Ionic Bonds

Covalent

Bonds

Dispersion

Forces

Dipole

Forces

Hydrogen

Bonds


Ionic and covalent bonding

Ionic and Covalent Bonding

Ionic

Covalent


Covalent bond polarity

  • Nonpolar Covalent bonds – equal sharing

    • 0.0 < Electronegativity difference ≤ 0.4

  • Polar Covalent Bond – unequal sharing

    • 0.4 < Electronegativity difference < 1.5

    • Line becomes arrow from positive to negative

  • Covalent Bond Polarity

    Insulin


    Why chemistry why again

    Molecular Polarity


    Molecular polarity examples

    CH4

    CO2

    NH3

    H2O

    Molecular Polarity examples


    Why chemistry why again

    Molecular

    Forces

    Intramolecular

    Forces

    Inter molecular

    Forces

    Ionic Bonds

    Covalent

    Bonds

    Dispersion

    Forces

    Hydrogen

    Bonds

    Dipole

    Forces


    Forces comparisons

    Forces Comparisons


    Dispersion

    Weakest intermolecular force

    Caused by the motion of electrons

    More electrons per molecule, more attraction between molecules; i.e. halogens

    Dispersion


    Intermolecular forces dispersion

    Intermolecular Forces - Dispersion

    Electrons momentarily gang up on one side of the molecule

    • e.g. bromine is a liquid, whereas iodine is a solid at STP


    Intermolecular forces dispersion1

    Intermolecular Forces - Dispersion


    Intermolecular forces hydrogen bonds

    • Strongest of the intermolecular forces

    • Only molecules with hydrogen in them

    • BIG role in living organisms!!!

    Intermolecular Forces – Hydrogen Bonds


    Why chemistry why again

    Hydrogen Bonds


    Hydrophilic hydrophobic

    Hydrophilic - Hydrophobic


    Water

    • H2O

    • What’s the H, what’s the O?

    • Why the 2?

    • Hydrogen Bonding – a big deal!

      • solubility (water is the universal solvent)

      • cohesion

      • adhesion

      • heat retention

    Water


    Amazing water properties

    • Solubility

    • Capillary Action

    • Heat of Vaporization

    • Heat of Fusion

    • Surface Tension

    • Density Differences

    Amazing Water Properties


    Water properties solubility

    Water Properties - Solubility

    Life’s necessity


    Water properties capillary action

    Water Properties- Capillary Action

    425 ft

    Paper Towels and Redwood Trees


    Heat of vaporization

    Heat of Vaporization


    Heat of fusion

    Heat of Fusion


    Water properties surface tension

    Water Properties – Surface Tension


    Water properties density

    Water Properties - Density


    All together now

    All together now

    Molecular

    Forces

    Intramolecular

    Forces

    Intermolecular

    Forces

    Ionic Bonds

    Covalent

    Bonds

    Dispersion

    Forces

    Dipole

    Forces

    Hydrogen

    Bonds


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