'Stronger bonds' diaporamas de présentation

Chapter 17 Free Energy and Thermodynamics

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The Chemical Context of Life

The Chemical Context of Life. Definitions. Matter Element Essential Trace Molecule Compound. Definitions. Molecule or Compound????. Oxygen NaCl or Water?. Atom Structure. Protons Neutrons Electrons. Periodic Table. Atom Structure. Atomic number Mass number Atomic weight.

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Lattice Energy

Lattice Energy. Properties affected by bond strength. melting/boiling point (stronger bonds = higher melting/boiling point). Properties affected by bond strength. melting/boiling point (stronger bonds = higher melting point/boiling point) hardness (stronger bonds = harder crystals).

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Lattice Energy

Lattice Energy. Properties affected by bond strength. melting/boiling point (stronger bonds = higher melting/boiling point). Properties affected by bond strength. melting/boiling point (stronger bonds = higher melting point/boiling point) hardness (stronger bonds = harder crystals).

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Intro to Acids and Bases

Intro to Acids and Bases. (again!). Naming acids . An acid is loosely defined as a compound that produces hydrogen ions (H + ) when dissolved in water Acids are named depending on the anion in the compound. Add H +. Add H +. Add H +. _______ ide (chloride, Cl - ).

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Extraction of Pure Elements from Nature

Extraction of Pure Elements from Nature. Which elements are easy?. Easy elements are gases that exist in the elemental form. N 2 , O 2 , noble gases Obtained by distillation of cooled, liquified air. Preview. Extraction of Metals.

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Composition of Matter

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Enthalpy and Bond Energies

Enthalpy and Bond Energies. For reactions: a. With simple molecules or atoms b. That occur only in the gas phase, with little attraction between particles. The change in enthalpy for a reaction can be estimated using Bond Energies.

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D H-Enthalpy using Bond Energies

D H-Enthalpy using Bond Energies. A theoretical approach to calculating enthalpy values for a chemical reaction can be approximated by using the potential energies associated with specific chemical bonds in a compound.

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