9.2 Measuring enthalpy changes

• q=mcΔT

  • q = heat energy change in joules
  • m = mass of solution is grams
  • c = specific heat capacity
  • ΔT=temperature change
• Major error = heat loss to surroundings
• Reducing heat loss

  • adding a lid
  • adding insulation
• Major errors for combustion reaction

  • heat loss to surroundings
  • incomplete combustion
  • evaporation
  • non-standard conditions being used
• ΔrH = q/n