AP®︎ Chemistry Unit 6: Notes & Study Guide

Prepare for your quiz, test, or the AP exam with a comprehensive review on Unit 6 of AP Chemistry – Thermochemistry.

Exam weight: 7%–9%
9 Topics

Unit 6: Thermochemistry

How energy flows during chemical reactions, measured through enthalpy changes and Hess's law.

Begin with Topic 6.1: Endothermic and Exothermi...

To review Unit 6, go through each of the 9 topics below.

Everything you actually need to know for your Unit 6 test, pulled directly from the AP® Chemistry curriculum.

Topic 6.1
~6 min
Review
Endothermic and Exothermic Processes
Endothermic and Exothermic Processes
  • Energy in Chemical and Physical Changes
  • Enthalpy and Energy Changes
  • Endothermic and Exothermic Processes
Review
Topic 6.2
~6 min
Review
Energy Diagrams
Energy Diagrams
  • What an Energy Diagram Shows
  • Key Parts of an Energy Diagram
  • Exothermic vs Endothermic Reactions
Review
Topic 6.3
~6 min
Review
Heat Transfer and Thermal Equilibrium
Heat Transfer and Thermal Equilibrium
  • Temperature as Average Kinetic Energy
  • What Heat Transfer Is at the Particle Level
  • What Determines Energy Transfer in Collisions
Review
Topic 6.4
~6 min
Review
Heat Capacity and Calorimetry
Heat Capacity and Calorimetry
  • Heat Transfer and Energy Conservation
  • The Heat Transfer Equation
  • Types of Calorimeters
Review
Topic 6.5
~6 min
Review
Energy of Phase Changes
Energy of Phase Changes
  • What Happens During a Phase Change
  • Molar Enthalpy of Phase Changes
  • Heating and Cooling Curves
Review
Topic 6.6
~6 min
Review
Introduction to Enthalpy of Reaction
Introduction to Enthalpy of Reaction
  • What the Enthalpy of Reaction Is
  • Where ΔH Comes From at the Particle Level
  • Molar Enthalpy of Reaction
Review
Topic 6.7
~6 min
Review
Bond Enthalpies
Bond Enthalpies
  • Bond Energy and Potential Energy
  • Bond Dissociation Energy and What Affects It
  • Calculating ΔH Using Bond Energies
Review
Topic 6.8
~5 min
Review
Enthalpy of Formation
Enthalpy of Formation
  • What Standard Enthalpy of Formation Is
  • How to Calculate ΔH°rxn from ΔHf° Values
  • How to Set Up the Calculation Correctly
Review
Topic 6.9
~6 min
Review
Hess’s Law
Hess’s Law
  • Hess’s Law
  • The Three Hess’s Law Rules
  • Using Hess’s Law Step by Step
Review

Notes

1 credit used · 5/5 remaining