The quiz will cover 5.6-5.9 and 6.1-6.5. I'll put out more info later today. Is anyone using the 12th or 13th edition paper textbooks in addition to the 14th ed. e-text? If so bond enthalpies are discussed in section 8.8. It might be better for you to use the 14th ed. e-text for this material and homework. Dr. Zellmer