Technical data

Melting and freezing curve of sodium thiosulphate

Article no: P1044600

Principle

The course of sodium thiosulfate's temperature during melting and subsequent freezing is measured. Moreover, it can be clearly seen that heat is necessary for the melting process: the temperature does not rise until all the salt has melted. During freezing this energy is released. This can be seen especially well when the molten salt first undercools and then immediately freezes when a salt crystal is dropped into it. The temperature rises immediately to the melting point.

Benefits

Real stand material for an esecially stable and safe setup
Student-suitable experiment descriptions with reports available

Scope of delivery

Support base, variable	02001-00	1
Stand rods, stainless steel, various sizes	02037-00	1
Boss head	02043-00	1
Ring with boss head, i. d. = 10 cm	37701-01	1
Glass tube holder with tape measure clamp	05961-00	1
Wire gauze with ceramic, 160 x 160 mm	33287-01	1
Universal clamp	37715-01	1
Agitator rod	04404-10	1
Beakers, Boro, low form, various sizes	46054-00	1
Beakers, Boro, low form, various sizes	46055-00	1
Test tube, Duran®, various lengths	36304-01	1
Spoon, with spatula end, 180 mm, plastic	38833-00	1
Students thermometer, -10...+110°C, l = 230 mm	38005-10	1
Digital stopwatch, 24 h, 1/100 s and 1 s	24025-00	1
Butane burner, Labogaz 206 type	32178-00	1
Butane cartridge C206, without valve, 190 g	47535-01	1
Sodium thiosulphate pentahydrate, 500 g	30169-50	1
Boiling beads, 200 g	36937-20	1