6 Physical Chemistry 6.4 Thermochemistry / Calorimetry
Determination of the hydration enthalpy of an electrolyte (solution enthalpy) (with Cobra3)
P3020711
Temperature-time curves of solutions of anhydrous and hydrated copper sulphate and determining the heat capacity of the system.
Principle When a solid electrolyte dissolves in water, a positive or negative heat effect occurs as a result of the destruction of the crystal lattice and the formation of hydrated ions. The enthalpy of hydration of copper sulphate can be calculated from the different heats of reaction measured when anhydrous and hydrated copper sulphate are separately dissolved in water.
Related Experiment Determination of the enthalpy of neutralisation (with Cobra3) P3020811
Tasks 1. Record temperature-time curves for the dissolution of anhydrous copper(II) sulphate and hydrated copper(II) sulphate in water. 2. Calculate the hydration enthalpy of anhydrous copper(II) sulphate.
Determination of the hydration enthalpy of an electrolyte (solution enthalpy) (with Cobra4) P3020760
What you can learn about ▪ ▪ ▪ ▪ ▪
Cobra4 Experiment - available 2013
Integral enthalpy of solution Hess' law Lattice energy Ion solvation Calorimetry
Main articles Set calorimetry, 230 V Cobra3 Data acquisition set for set calorimetry Desiccator, wertex, diam. 150 mm Butane burner, Labogaz 206 type Silica gel, orange, granular, 500 g Copper-II sulphate, anhydr. 250 g Set of Precision Balance Sartorius CPA 6202S and measure software, 230 V
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