Chemistry 2.4 - Energy from fuels

• Define exothermic?

  A reaction that releases heat
• Define endothermic?

  A reaction that absorbs heat
• Eh = cm (delta) t
• Two reasons why experimental value could be lower than theoretical value?

  • Heat loss
  • Incomplete combustion
• What evidence would there be of incomplete combustion?

  Soot
• How does a calorimeter more accurately measure energy release?

  • It is a contained area to minimise heat loss
  • Has an oxygen atmosphere to complete combustion