Exothermic crystallisation

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Uploaded by on Mar 7, 2007

In this experiment Professor Najdoski cuts the stems of two barrel pipettes containing a hypersaturated solution of 6 g of sodium acetate. Between the pipette heads the thermoelectric couple of a digital multimeter is located.
Observation:
1. Crystals grow starting from the stems.
2. Increase of temperature.
3. Decrease of volume.
URL (english): www.micrecol.de/najdosKristE.html
URL (german): www.micrecol.de/najdosKristD.html

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  • nice, im also from macedonia :P

  • sodium ice

  • well done professor Najdoski!!!Greetings from your student from Skopje Martin Gigovski!!!

  • this is a really fascinating expirement.

  • Temperature shown is in Celcius.

    hFE is to measure the gain of a transistor.

  • whats mean the values on the multimetro?

    it's temperature? ºC or ºF?

    i have a similar multimetro, how u can read temperature and what function u use? hFE option?

    thkx

  • nice =D

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