BRAINCAKEAccuracy of Experimental Value
The data book value for methanol is -726 kJmol-1. The experimental value may be less exothermic than expected because data book values are obtained using more accurate apparatus so more heat is transferred to the water. The reasons for less heat being transferred are:
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Key terms in this lesson
- Exothermic
- Describes a process in which heat energy is transferred from the system to the surroundings, so the enthalpy change is negative.
More in Enthalpy
- Enthalpy Change of Formation
- Enthalpy Change of Combustion
- Enthalpy Change of Neutralisation
- Measuring the Enthalpy Change of Combustion
- Determining the Enthalpy Change of a Reaction
- Cooling Curves
- Average Bond Enthalpy
- Calculating Enthalpy Changes from Bond Enthalpies
All 19 lessons in Enthalpy · All OCR AS-level Chemistry topics