What you’ll learn2 learning objectivesChoose one objective for a focused lesson, or study the complete topic.1.2.1Bond energies• Bond-breaking absorbs energy• Bond-forming releases energy• Calculate enthalpy change from average bond enthalpiesSyllabus objective1.2.2Hess's law• Enthalpy change independent of pathway• Apply Hess's law to multistep reaction cyclesSyllabus objective