Module 1: Energetics: Enthalpy of Reaction Skills: M&M
Introduction The enthalpy change of the above reaction cannot be determined experimentally, thus Hess’s Law will be applied to achieve this objective. Two reactions will be conducted and via Hess’s Law, the enthalpy change of the above reaction will be determined. Both calcium oxide and calcium carbonate will be reacted with dilute hydrochloric acid and the enthalpy changes of those reactions will allow one to achieve the aim of this experiment.
1.1g of calcium oxide was measured using a suitable weighing vessel and it was placed in a calorimeter.
50 cm3 of 1M HCL was measured and it was allowed three minutes to pass and it was then measured and its temperature was recorded.
The acid was quickly poured into the calorimeter but carefully, the mixture was stirred and the thermometer was used to measure the final temperature.
Results were recorded.
Steps 1-3 was recorded using calcium carbonate instead of Calcium oxide.
