The candle lab: calculationsData: 0.95 g, 30.6 °C1.

q = heat/energy change, units: J or Joules c = specific heat, units: J/g°Cm = mass, units: g or gramsT= temperature change, units: °C

2. 200 g3. q = cmT = 4.18 J/g°C x 200 g x 30.6 °C

= 25 582 J or 25.6 kJ

4. 25.581 kJ/0.95 g wax= 26.9 kJ = 27 kJ

5. First, assume the heat absorbed by the water is equal to the heat released by the candle1 mol C25H52 = 352 g or 352.52

#mol= 0.95 gx 1 mol / 353 g= 0.00269 molkJ/mol = 25.581 kJ / 0.00269 mol

= 9 510 kJ/mol = 9.5 x 106 J/mol6. Calorimeter: An apparatus used in the

determination of the heat of a reactionCalorimetry: The science of measuring the quantities of heat that are involved in a chemical or physical change.

7. The calorimeter is made up of more than just water (the metal from the can)Other sources of error include anything that interferes with the transfer of heat or the measurement of that heat. E.g. incomplete transfer of heat, loss of heat, evaporation of water, incomplete combustion.

Not:experimental error, inaccurate thermometer

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