The second edition ofPeer-Led Team Learning General Chemistrymaintains the underlying philosophy and approach of the first edition, i.e., active learning in peer-led groups engages students in the process of learning chemistry. This engagement results in improved understanding of chemistry concepts and the process of science. The peer-led group model also helps students develop the communication and teamwork skills that are critical in the twenty-first century workplace.

The Search for Elements	p. 1
Atoms and Subatomic Structure	p. 17
Introduction to Stoichiometry	p. 29
Strategies for Stoichiometry	p. 41
Ions in Solution	p. 53
Gases: Nature, Laws and Applications	p. 65
Thermochemistry	p. 77
Energy and the Hydrogen Atom	p. 91
Building Atoms with Quantum Leaps	p. 105
Covalent Bonding	p. 117
The Structure of Molecules	p. 125
Oxidation-Reduction Reactions	p. 137
Solutions	p. 149
Chemical Kinetics: Concepts and Models	p. 163
Rate Data and Rate Equations	p. 175
The Transition State and Catalysis	p. 187
Equilibrium Concepts	p. 203
Introduction to Acids and Bases	p. 217
The Acid-Base Concept	p. 231
Buffers and Titrations	p. 241
Solubility Equilibria	p. 251
Entropy Concepts	p. 265
Enthalpy, Entropy, and Free Energy Calculations	p. 275
Electrochemistry	p. 291
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PrefaceThe second edition ofPeer-Led Team Learning General Chemistrymaintains the underlying philosophy and approach of the first edition, i.e., active learning in peer-led groups engages students in the process of learning chemistry. This engagement results in improved understanding of chemistry concepts and the process of science. The peer-led group model also helps students develop the communication and teamwork skills that are critical in the twenty-first century workplace.The second edition is also designed to be used as a workbook. It is purposely the size of a notebook in the hope that you, the chemistry student, will carry it around and use it frequently. It has ample space for you to record your notes and questions about the material. And, most important,it includesspace to record the results of group workthe solutions to the Workshop problems and the thinking behind those solutions.The Workshop problems reflect the breadth of scientific problem solving-namely, the use of flowcharts, model building, simulations, and estimations-to help you understand and apply chemistry concepts.Week by week, you will be creating your ownsolutions guide thatwill be full of your thoughts and reflections on the problems you've solved. It will have a record of the logic that you and your classmates used to figure out the answers, and the process you used to search out the solutions. You can refer to yoursolutions guidethroughout the semester just as you refer to your lecture notes. You can use it as a study guide for examinations and a reference for subsequent chemistry courses. This is a resource that you will keep long after you've traded in your used textbook.The changes in the second editionwereinspired by feedback from reviewers and the students and faculty who have used the first edition over the pastfiveyears. We have adopted their suggestions to make the book more user friendly and to simplify the language and writing style.We have carefully examined the entire text, rewriting when necessary, to ensure that all content is presented in a theoretically accurate and pedagogically sound manner. By way of example, we have provided an improved and conceptually more correct treatment of enthalpy of formation in Unit 7 and have introduced the correct treatment for the kinetics of the steady state in Unit 17. Additionally, the kinetics workshop now includes new simulation parameters that demonstrate that a steady state requires neither a slow first step nor an intermediate of particularly low concentration. We have dividedthe text into smaller, bite-sized pieces that relate directly to the problems in the self-test and the workshop. We have changed the self-test format from a single test at the end of the unit to several smaller tests that follow each bite-sized section of text.We hope that this new configuration provides opportunities to think about the concept and to self-assessunderstanding before proceeding further.The book's 24 chapters (workbook units) parallel the sequence of a typical general chemistry textbook. Each unit ends with a workshop that has more problems than can be done in a single group meeting. This was deliberately done to giveinstructorsthe ability to choose the problems that best meet the needs of the local curriculum.Each workshop includes numerous suggestions to facilitate collaborative work on the problems. While the workbook is tailored for a Peer-Led Team Learning environment, it can also be used as a supplementin those traditional lecture coursesin which instructors encourage collaborative learning.We encourage anyone who has comments or feedback about the text or interest in Peer-Led Team Learning to contact the authors.We want to thank all the individuals who have made contributions to the workbook over the past few years. We are grateful to all of the students and gr