06. Chemical Energetics

• Describe the meaning of exothermic and endothermic reactions

• Interpret energy level diagrams showing exothermic and endothermic reactions

• Describe bond breaking as an endothermic process and bond forming as an exothermic

process

• Draw and label energy level diagrams for exothermic and endothermic reactions using

data provided

• Calculate the energy of a reaction using bond energies

• Describe the release of heat energy by burning fuels

• State the use of hydrogen as a fuel

• Describe radioactive isotopes, such as ²³⁵U, as a source of energy

• Describe the use of hydrogen as a fuel reacting with oxygen to generate electricity in a fuel cell. (Details of the construction and operation of a fuel cell are not required.)