Enthalpy and entropy as driving forces of chemical reactions Principle The experiment examine the terms enthalpy and entropy as the main forces of chemical reactions. Students perform the reaction of zinc and hydrochloric acid as an example of an exothermic reaction. The heat, which is developed by the raction, is measured with a thermometer. The reaction of barium hydroxide with ammonium rhodanide is performed as an example of an endothermic reaction. This reaction mixture cools down to a temperature of -20 ° C, which can be monitored with a thermometer. Learning objectives - Entropy and enthalpy as main forces in chemical reactions
- Exothermic and endothermic reaction
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Support base DEMO
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02007-55
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1
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Stand rods, stainless steel, various sizes
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02037-00
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1
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Right angle boss-head clamp
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37697-00
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1
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Universal clamp
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37715-01
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1
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Supporting blocks,set of 4
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02070-00
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1
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Round bottom flask, 250 ml, 2-neck, GL25/12, GL18/8
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MAU-27220005
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1
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Beakers, Boro, high form, various sizes
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46032-00
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1
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Beakers, Boro, high form, various sizes
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46027-00
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1
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Thermocouple NiCr-Ni, -40..1300°C
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13615-01
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1
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Graduated cylinders, Boro, various sizes
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36629-00
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1
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Support clamp for small case
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02043-10
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1
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Protective sleeves f.temp.probe,2
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11762-05
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1
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Spoon, special steel
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33398-00
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1
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Wash bottle, plastic, 500 ml
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33931-00
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1
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Weighing dishes, square shape, 84 x 84 x 24 mm, 500 pcs.
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45019-50
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1
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Ammonium thiocyanate 50 g
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30942-05
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1
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Zinc, granul., 99.5%, 500 g
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31998-50
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1
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Barium hydroxide 250 g
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30034-25
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1
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Hydrochloric acid 37 %, 1000 ml
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30214-70
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1
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Magnesium, ribbon, roll, 25 g
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30132-00
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1
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Water, distilled 5 l
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31246-81
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1
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PHYWE Demo Multimeter ADM 3: current, voltage, resistance, temperature
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13840-00
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1
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Service
