Chemical energetics (Section 2 of 2)

What does Lattice enthalpy depend upon?Charge of the ions: As the charge increases the lattice enthalpy becomes more exothermic For Example: Lattice enthalpies of  (Mg has a 2+ charge while Li has a 1+ charge) MgO.......-1050 KJ/mol LiO.........- 3923 KJ/mol Size of the ions: the lattice enthalpy becomes less exothermic as the size of the ion decreases, because as the size increases the the attraction between the two oppositely charged ions...

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Chemical energetics (Section 1 of 2)

The Born Haber CycleWhat is the Born Haber Cycle?The born Haber cycle can be used to determine lattice enthalpy of a compound. In the born Haber cycle every step from the elements to the ionic compound can be measured experimentally except the lattice enthalpy which therefore can be calculated using the Hess's law What is Lattice enthalpy?Lattice enhalpy is the energy change that occurs when 1 mole of an ionic compound is formed from its gaseous...

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Chemical Bonding (Section 2 of 2)

Contents of this page Intermolecular forces of attraction Hydrogen Bonding Vander Waals Forces Temporary Dipole induced dipole Forces Dipole Dipole forces of attraction ======================================== Van der Waals Forces and Hydrogen BondingHydrogen Bonding (The strongest Force) What is Hydrogen Bonding? In hydrogen bonds, the positively charged hydrogen end of one molecule is attracted to the negatively charged end of another...

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States of Matter

The Kinetic Theory of Matter i      All matter is composed of small particles. ii     The particles of matter are in constant motion. iii     All collisions between the particles of matter are perfectly elastic Particle motion: atoms move in a straight line between collisions. The Solid State Gases: The Kinetic Theory Two of the basic assumptions of this theory are: Actual...

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