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Solid Carbon Dioxide: Liquid Let Out into a Woollen Bag and Pressed in a Wooden Mould (Landolt, Thorpe 1912)
Dry ice without a machine: when liquid carbon dioxide is suddenly let out of its bottle, part of it boils off at once and the cold freezes the rest. Landolt caught the snow in woollen bags and pressed it into blocks in conical wooden moulds.
Solid carbon dioxide is a white, snow-like mass that can lie in the air for some time without much loss; a thermometer pushed into it reads -79 °C.
Not given: amounts, yield, and the sizes of bags and moulds.
Source: E. Thorpe, Dictionary of Applied Chemistry vol. I (1912), Carbon, pp. 670-671, after Landolt, Ber. 17, 309. Picture: KarolinaHalatek, Wikimedia Commons, CC BY-SA 4.0.
Katamtaman
Unknown
Mga Tagubilin
1
1
Let the liquid out into a woollen bag
Let the liquid out into a woollen bag
Take liquid carbon dioxide in its iron or steel bottle (Thorpe: bottles of 8 kg, about 4000 litres of gas). Let the liquid out freely into a woollen bag. Part of it vaporises at once and escapes through the cloth; the cold this makes freezes the rest into a white, snow-like solid that stays in the bag.
Mga materyales para sa hakbang na ito:
Likidong carbon dioxide1 amount not givenMga kailangang kasangkapan:
Tangke ng gas na may presyon
Supot na lana2
2
Press into blocks
Press into blocks
Fill the loose solid into a conical wooden mould and compress it with a wooden piston to a firm block.
Mga kailangang kasangkapan:
Hulmahang kahoy na hugis-apa na may pistonMga Materyales
1- 1 amount not givenPlaceholder
Mga Kinakailangang Kasangkapan
3- Placeholder
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