(©2007, François G. Amar, All rights reserved)

Summary for Week 7

Reading:

For this week: Finish Chapter 4 and start Chapter 5

Homework problems:

End of Chapter 4: 31, 33, 35, 39, 40, 41, 43, 45, 50, 51, 53, 55, 56, 67, 70, 80, 83

Beginning of Chapter 5: 2, 6, 11, 12, 14, 18, 19, 21, 28, 30, 37, 39, 42

OWL Assignment for Week 7:

Our second Chapter 4 assignment (called Ch 5 in OWL) redox, acid-base, titration: due October 21, 2007

Key concepts and equations:

Chapter 4 material

oxidation and reduction reactions always occur together

activity series for oxidation of metals

solution stoichiometry

quantitative calculations with molarity

titration

equivalence point

indicators

Chapter 5 material

energy, work, and heat

system, surroundings, universe (or system + surroundings = universe)

walls and their properties (see handout)

internal energy change, E

exothermic and endothermic processes

state function or function of the state of the system

heat absorbed by system, q

work done on system, w; w= -PV

process variables govern the history of the system

First Law of Thermodynamics, E = q + w or E = q - PV

q_V is the heat absorbed at constant volume, E = q_V since V = 0 at constant volume

enthalpy change, H, is the change in a function of state

H is defined as (E + PV)

q_P is the heat absorbed at constant pressure, H = q_P

enthalpy of reaction, H_rxn = H(products) - H(reactants)