BRAINCAKEEvaluating Sources of Error
The data book value for methanol is -726 kJmol-1. The experimental value may be less exothermic than expected because in the simple apparatus not all of the heat released is transferred to the water. The reasons for less heat being transferred are:
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Key terms in this lesson
- incomplete combustion
- Combustion in a limited supply of oxygen, producing carbon monoxide and/or carbon as well as water, and releasing less energy.
More in Enthalpy
- Exothermic and Endothermic Reactions
- Standard Conditions
- Standard Enthalpy Change of Combustion
- Experimental Determination of Enthalpy Change of Combustion
- Standard Enthalpy Change of Neutralisation
- Experimental Determination of Standard Enthalpy Change of Neutralisation
- Standard Enthalpy Change of Formation
- Enthalpy Change of a Reaction
All 21 lessons in Enthalpy · All Edexcel AS-level Chemistry topics