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Chemical Bonding Fundamentals: Understand, Remember, Apply!

Learn about bonding, energy release, and breaking bonds. Coulomb's Law helps predict melting points and bond strength. Understand its equation and implications. Explore how charge, charge density, and bond distance impact energy. Ace your chemistry!

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Chemical Bonding Fundamentals: Understand, Remember, Apply!

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  1. Bonding: Remember Always!! Forming a Bond: • Releases Energy • Is exothermic • H is negative (-) Breaking a Bond: • Requires Energy • Is endothermic • H is positive (+)

  2. Coulomb’s Law This is given to us in the form of an equation: But we’ll NEVER be asked to calculate a numeric answer using it! So what’s its purpose?

  3. Coulomb’s Law • We can predict melting points using these principles • We can predict “bond strength” using these principles The greater the value of Eion pair , the higher the MP, the stronger the bond.

  4. Coulomb’s Law • (n+e) and (n–e) are the charges of the ions involved. For CaO, the numerator is 4x that as for NaCl (2x2 vs. 1x1) • d is the “bond distance”, which is related to ion size. We need to know our trends! Smaller ions means greater Eion poir .

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