Chief Scientist Carl Nelson demonstrates how to create liquid carbon dioxide from dry ice (solid carbon dioxide). 13abc anchor Tony Geftos is amazed by the transformation.
So, I'd just have to have a sufficiently strong pressure vessel to contain the gaseous CO2 in order to keep the rest liquid once the vessel returns to room temperature?
when co2 is at atmospheric pressure, it cannot maintain a liquid state, thats why it goes from a solid block to a gas immediately. when put in the pipette and sealed, it allows pressure to build inside the pipette, allowing for a liquid state to be achieved, however as the pressure builds inside the pipette, the plastic cannot maintain physical structure and bursts. when the pipette bursts, all the pressure that was inside is immediately reduced back to atmospheric pressure, which then immediately reverts the dry ice back to its solid form
Aliyah Watson you mean decrease the pressure right? Cuz temperature and pressure have a direct relationship and by decreasing pressure temperature drops and therefore it will get to a point in which carbon dioxide becomes liquid
@@Alisonn2 no, we have to increase the pressure to about 5.1 atm because at barometric pressure at sea level, co2 can only sublime. So, it is not only temperature that plays role in phase changes, pressure also plays a huge role. To understand this; you have to check what we call 2D phase diagrams; being Pressure vs Temperature the most popular.
