Chemistry

1 AP Chemistry Chapter 22 - Organic Chemistry 22.1 Alkanes: Saturated Hydrocarbons A. Straight-chain Hydrocarbons 1. Straight-chain alkanes have the formula CnH2n+2 2. Carbons are sp3 hybridized The First 10 Alkanes # of Carbons Name Formula (CnH2n+2) 1 Methane CH4 2 Ethane C2H6 3 Propane C3H8 4 Butane C4H10 5 Pentane C5H12 6 Hexane C6H14 7 Heptane C7H16 8 Octane C8H18 9 Nonane C9H20 10 Decane C10H22 B. Structural Isomers 1. Same formula, but the atoms are bonded together in a different order 2. Different bonding order results in different properties C4H10 Butane C4H10 2-methylpropane C. Rules for Naming Alkanes (Nomenclature) 1. For a branched hydrocarbon, the longest continuous chain of carbon atoms

AP Chemistry A. Allan Chapter 18 - The Representative Elements: Groups 1A through 4A 18.1 A Survey of the Representative Elements A. Basic Trends 1. Metals tend to lose electrons and form cations 2. Nonmetals tend to gain electrons and form anions 3. Metalloids (semi-metals) have properties of both metals and nonmetals a. B, Si, Ge, As, Sb, Te, Po, At 4. Metallic character tends to increase as atomic number increases within a group B. Atomic Size and Group Anomalies (Anomaly = oddity) 1. Hydrogen vs. Other Group I Elements a. Very small, relatively high electronegativity (2.1) b. Forms covalent bonds with nonmetals - other Group I elements form ionic bonds with nonmetals 2. Beryllium vs. Other Group II Elements a. Small, electronegativity of 1.5 produces covalent bonds with

1 Chapter 16 - Spontaneity, Entropy, and Free Energy 16.1 Spontaneous Processes and Entropy A. First Law 1. "Energy can neither be created nor destroyed" 2. The energy of the universe is constant B. Spontaneous Processes 1. Processes that occur without outside intervention 2. Spontaneous processes may be fast or slow a. Many forms of combustion are fast b. Conversion of diamond to graphite is slow C. Entropy (S) 1. A measure of the randomness or disorder 2. The driving force for a spontaneous process is an increase in the entropy of the universe 3. Entropy is a thermodynamic function describing the number of arrangements that are available to a system a. Nature proceeds toward the states that have the highest probabilities of existing D. Positional Entropy