AQA GCSE Chemistry Enthalpy Change
This page covers the following topics:
1. Standard Enthalpy Change
Enthalpy is the overall energy content of substances in a reaction, it is represented by ∆H. In order to compare reactions and calculate energy changes accurately ∆H is calculated using theoretical standard conditions.
Calorimetry measures enthalpy changes from combustion using the equipment shown. It can also be used to measure other reactions using a beaker with a cork stopper and thermometer.
Why are standard conditions used?
Suggest one source of error in calorimetry equipment
Why and how is the change in mass of the spirit burner measured?
Why should the starting temperature of the water be kept the same?
What is measured in calorimetry?
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