BRAINCAKEMeasuring the Enthalpy Change of A Reaction
To determine the enthalpy change of the reaction the heat given out or taken in as the reaction proceeds is calculated by using the specific heat capacity of water.
The specific heat capacity of water is the amount of energy needed to heat 1g of water by 1K and is 4.18 joules per gram per kelvin. This means it takes 4.18 joules of energy to heat one gram of water so its temperature rises by 1K.
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Key terms in this lesson
- Enthalpy
- A measure of the heat energy stored in a chemical system.
- Enthalpy change
- The heat energy transferred between the system and its surroundings during a process carried out at constant pressure.
More in Energetics
- Enthalpy Change ΔH
- Physical States of Reactants and Products
- Enthalpy Level Diagrams
- Standard Enthalpies
- Simple Colorimeter
- Flame Colorimeter
- Neutralisation Reactions
- Displacement Reactions
All 24 lessons in Energetics · All AQA AS-level Chemistry topics