Houston Community College

CHEM 1311

CHAPTER 6 - Thermochemistry
 Defnition of energy, kinetic energy and potential energy
 Units, joules and calories, 1 cal = 4.184 J
 First law of Thermodynamics
 Internal energy (E), E = q + w
 State functions
 Enthalpy (H), H = q at constant pressure, exothermic processes
(negative H value) and endothermic processes (positive H value)
 Hess’s law and related problems
 Specifc heat and heat capacity
 H = q = specifc heat x grams of substance x T
 Heat = heat capacity x T
 Calorimetry, problems dealing with coffee-cup and bomb calorimeter
 Calculating enthalpies of reactions using enthalpies of formation (Hfo)
CHAPTER 7 –Electronic Structure of Atoms
 Electromagnetic radiation
 c = wavelength x frequency (c = λν)
 Relationship between the energy of radiation and its frequency or
wavelength
 Planck’s quantum theory, E = hν
 Photoelectric effect and the photon
 Bohr’s model of the hydrogen atom
 Principal quantum number n, En = –RH (1/ n2), n = 1, 2, 3,….
 Electronic transitions, E = RH (1/ni2 – 1/nf2 )
 Wave functions and electron density
 Quantum mechanical description of orbitals, their shapes and energies
 Shells (energy levels) and subshells (sublevels)
 Four quantum numbers (n, l, ml, ms)
 Pauli Exclusion Principle, Aufbau principle, and Hund’s rule
CHAPTER 8 – Periodic properties of the elements
 Periodic table
 Effective nuclear charge
 Sizes of atoms and ions
 Ionization energy
 Electron Afnity
 Metals, Nonmetals and Metalloids