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Thermochemistry is the study of the relationship between heat and chemical reactions. It involves measuring and calculating the energy changes that occur during a chemical reaction.
The purpose of a thermochemistry lab is to investigate and analyze the energy changes that occur during chemical reactions. This can help us understand the principles of thermodynamics and how energy is transferred in chemical systems.
Some common techniques used in a thermochemistry lab include calorimetry, which involves measuring heat changes, and Hess's law, which allows us to calculate the energy change of a reaction by combining the energy changes of multiple reactions.
The enthalpy change of a reaction is calculated by subtracting the enthalpy of the reactants from the enthalpy of the products. This can be determined experimentally through calorimetry or calculated using thermodynamic data.
Potential sources of error in a thermochemistry lab include heat loss to the surroundings, incomplete reactions, and experimental errors in measuring temperature and mass. It is important to control these variables as much as possible to obtain accurate results.