Calorimetry

• What is the main error in calorimetry practicals?

  Heat loss to the surrounding air
• How can heat loss in calorimetry be reduced?

  By insulating the can and using a lid
• What is a consequence of incomplete combustion in calorimetry?

  Build up of soot which is an insulator
• Why does incomplete combustion lead to soot formation?

  Because less energy is released
• What happens to alcohols during calorimetry?

  They can evaporate easily
• What issue arises when the lid of the calorimetry apparatus is removed?

  Mass can be lost due to evaporation
• When might bond energy calculations be preferred over calorimetry?

  When activation energy is too high
• What is a limitation of using calorimetry for some reactions?

  The reaction may be too slow
• What are the main procedural errors in calorimetry practicals?

  • Heat loss to surrounding air
  • Heat loss from the can
  • Loss of mass due to Alcohol evaporation
  • Incomplete combustion, build up of soot acts as an insulator
• What methods can be used to minimize errors in calorimetry?

  • Insulate the can
  • Use a lid to prevent evaporation
  • Employ a draught excluder