Determination of the enthalpy of solution of salts

VC1.7.3.1
Determination of the enthalpy of solution of salts
Determination of the enthalpy of solution of salts The enthalpy of solution of different salts
Determination of the enthalpy of solution of salts

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Description

When a salt is dissolved in water, it can heat the solution up or cool it down. Accordingly, the enthalpy of solution is either negative (heat generating) or positive (heat absorbing). For the dissolution of the crystal, the so-called lattice energy must be applied. In hydration, on the other hand, energy is released. Enthalpies of solution cannot be calculated with certainty, but rather must be determined experimentally.

Experiment C1.7.3.1 determines the enthalpy of solution of various chloride salts. For this purpose, the salts LiCl, KCl and NaCl are dissolved in the transparent demonstration Dewar flask. The enthalpy of solution can then be calculated from the temperature change.

Components of equipment sets

1 38640 Glass calorimeter LD
1 524018  8  Pocket-CASSY 2 Bluetooth LD
1 524019 Rechargeable battery for Pocket-CASSY 2 Bluetooth LD
1 5240031  4  Bluetooth dongle LD
1 524220  4  CASSY Lab 2 LD
1 529676  4  Temperature probe, NiCr-Ni, 1.5 mm, type K LD
1 5240673  4  NiCr-Ni adapter S, type K LD
1 664155  4  Watch glass dish 100 mm Ø LD
1 607105  4  Magnetic stirrer mini LD
3 666851  4  Stirring magnet 25 mm x 6 mm Ø, circular LD
1 30011  8  Saddle base LD
1 30126  8  Stand rod 25 cm, 10 mm Ø LD
1 30109  4  Bosshead S LD
1 602953  4  Measuring cylinder, Boro 3.3, 100 ml, glass base LD
1 6677977  4  Electronic Balance 440-3N, 200 g : 0.01 g LD
1 666968  4  Spoon-ended spatula, stainless steel, 180 mm LD
1 6730510  4  Lithium chloride, 100 g LD
1 6725210  4  Potassium chloride, 250 g LD
1 6735710 Sodium chloride, 500 g LD
1 additionally required:
PC with Windows XP/Vista/7/8/10 (x86 or x64)

Experiment Instructions

PDF (Experiment description) PDF (Experiment description) C1.7.3.1 Determination of the enthalpy of solution of salts
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