Module 1

Module 1—Thinking Energy

Lesson Summary

In Lesson 6 you considered the following question:

• How are enthalpy changes communicated?

You learned that enthalpy changes can be communicated in the following four ways:

• molar enthalpy of reaction for a specific reactant
• enthalpy change for a balanced reaction equation
• inclusion of the energy as a term in a balanced reaction equation
• chemical potential energy diagrams

Each of these methods is useful for expressing the type and magnitude of enthalpy changes. You evaluated the importance of expressing enthalpy changes in each of these ways. You explained how communicating enthalpy changes could help you identify which fuels might be preferred for your ecotour.