Possible sources of error
- Created by: Jasmin
- Created on: 02-01-14 11:23
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- Possible sources of error
- Systematic: inaccuracies in the calculated enthalpy change. Due to experiemtnal set-up or limitations of the equipment
- Examples with calorimetry generally
- Heat will be absorbed by the container, rather than going towards heating up the water
- Some heat always lost to the surroundings
- Examples with flammable - liquid calorimetry
- Some combustion may be incomplete - means less energy will be given out
- Some of teh flammable liquid may escape by evaporation (usually quite volatile)
- Examples with calorimetry generally
- Random errors: arise from measurement uncertainities
- E.g. mass of water or the recorded temperature
- To deal with this repeat experiment and take an average
- ACCURACY 'how close to the true value'
- RELIABILITY 'how reproducible'
- Repeating an experiment shows whether your results are reliable
- Systematic: inaccuracies in the calculated enthalpy change. Due to experiemtnal set-up or limitations of the equipment
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