Where does this come from, and can I check it?

Frozen carbon dioxide skips the liquid stage at ordinary air pressure. The figure is taken from American Chemical Society, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a science fact?

Yes. It sits on the Science shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

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The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

Dry ice turns straight from solid to gas

Frozen carbon dioxide skips the liquid stage at ordinary air pressure At atmospheric pressure carbon dioxide has no stable liquid form, so the solid sublimates directly into gas. That happens at about minus 78.5 degrees Celsius, cold enough to freeze water vapour in the air into fog. The white cloud you see around dry ice is condensed water, not carbon dioxide. It sits in Mondo's science collection, one of 200 facts that each trace back to the reference below.

Where this comes from

American Chemical Society

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Plasma is the most common state of matterStars and glowing gas are plasma, so most visible matter is ionised A Bose-Einstein condensate behaves as one atomCooled to within a fraction of a kelvin, some atoms merge into a single quantum state Evaporation cools whatever is left behindThe fastest molecules escape as vapour, lowering the average energy of the rest Most carbon dioxide travels as bicarbonateAbout seventy percent of the carbon dioxide leaving tissues rides in plasma as bicarbonate ions Swiss cheese holes come from bacteriaPropionibacteria ferment lactate in the warm cellar and release carbon dioxide Roasted coffee releases gas for daysCarbon dioxide trapped inside the bean escapes slowly once roasting ends

Tags: chemistry, matter, carbon-dioxide

Dry ice turns straight from solid to gas: the short answers

Where does this come from, and can I check it?: Frozen carbon dioxide skips the liquid stage at ordinary air pressure. The figure is taken from American Chemical Society, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a science fact?: Yes. It sits on the Science shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.