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Unformatted text preview: be multiplied by n. Hess’ Law: The value of H for a reaction is the same whether it occurs in one step or several steps: H = H1 + H2 + H3 + … Standard Enthalpy of Reaction ( H ): rxn
– Enthalpy change accompanying a chemical reaction at standard state conditions f
Standard Enthalpy of Formation ( H ): – Enthalpy change for the formation of 1 mole of a compound from its elements in their standard states. Solve problems using H and H : f rxn – Be able to calculate H given H for all the f rxn
reactants and products – Be able to calculate H for one reactant or f
product given H and H for the other f rxn
reactants and products page 1 of 3 Chapter 8: Chemical Bonding valence electrons: outermost electrons – the group number for each element is equal to its number of valence electrons electronegativity (EN): ability of an atom in a bond to draw electrons to itself – Know F is most electronegative; farther away an atom is from F, less electronegative the atom. ionic bond: electrostatic attraction between cations and anions, holding the ions together in an ionic compound covalent bond: sharing of electrons between two nonmetal atoms • polar covalent: unequal sharing of electrons by 2 atoms...
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This document was uploaded on 03/22/2014 for the course CHEM 161 at Seattle Central Community College.
- Fall '