calorimetry

• Describe how to use a calorimetry to measure energy content of food


  -use a bunsen burner to burn the food

  -use thermometer to measure temperature of the water at the start

  -hold burning food under the beaker for one minute

  -measure temperature of the water at the end

  -work out the difference in temperature to calculate the energy content
• What are the control variables?

  -same volume of water

  -time for burning food

  -distance between burning food and beaker/water
• Why does the calorimetre have a lid?

  -so the water doesn't evaporate

  -to prevent heat energy from escaping into the surroundings

  -to ensure accurate results are obtained
• Why stir the water?

  to evenly distribute the heat throughout the water