AP CHEMISTRY UNIT 6 SELF CHECK

AP Chemistry Exam Prep – Unit 6 Rescue Pack

🌟 Common Mistakes (Watch Out!)

• Mistake 1: Confusing exothermic and endothermic sign conventions (ΔH).
• Mistake 2: Forgetting to reverse the sign of ΔH when reversing reactions in Hess's Law.
• Mistake 3: Mixing up heat (q) and temperature change (ΔT).
• Mistake 4: Misusing average bond enthalpy calculations.
• Mistake 5: Assuming all combustion reactions are endothermic.

🎯 Grade Predictor Quick Test

Answer the following 5 questions to estimate your grade:

1. What is the sign of ΔH for an exothermic reaction?
Negative
Positive
Zero

2. In Hess's Law, what must be done when a reaction is reversed?
Change the sign of ΔH
Double ΔH
Use the absolute value

3. Which equation represents heat absorbed or released?
q = mcΔT
ΔH = q/n
q = PΔV

4. What type of process is the combustion of methane?
Exothermic
Endothermic
Isothermal

5. When using bond enthalpies, what formula is used?
ΔH = Bonds broken - Bonds formed
ΔH = Bonds formed - Bonds broken
ΔH = q / m

📊 AP Score Estimator (Rough Guide for Unit 6 Mastery)

Enter your practice test scores to estimate your AP score:

MCQ Score (out of 60):

FRQ Score (out of 40):

📋 Final Week Action Checklist (Unit 6)

• Review exothermic vs. endothermic reactions.
• Practice Hess's Law problems and ΔH calculations.
• Drill calorimetry questions using q = mcΔT.
• Complete 10 MCQs and 2 FRQs from Unit 6.
• Quiz yourself on bond enthalpies and sign conventions.