Can carbon dioxde be liquified?
And also tell me the uses of luquid carbon dioxde
- Yes. They use supercritical CO2 to decaffeinate coffee.20
- yes it can be liquified and the solid carbondioxide is known as dry ice.10
- Yes, but not at normal atmospheric pressure. At ambient pressures, frozen carbon dioxide (dry ice) sublimates directly from solid to vapor. To get liquid CO2, you need pressures in excess of 5 atmospheres (~74 psi).
But at these very high pressures, liquid CO2 is stable, and has some very useful properties. It is used as a degreaser and cleaner in the electronics industry for certain extremely sensitive products. And, as another answerer stated, it can be used to decaffeinate coffee and tea.
See the Wiki article for more details.00
- Yes, at the right temperature and pressure.10
- yes CO2 can be liquified under reduced pressure and low temperature
the commercial name of liquid CO2 is dry ice and it is used as a refrigirant in place of freons01
- Carbon dioxide has no liquid state at pressures below 5.1 atm, but is a solid at temperatures below -78 °C. In its solid state, carbon dioxide is commonly called dry ice.
Carbon Dioxide is an acid gas, this can be proved by putting litmus paper into it - the litmus changes its color from blue to pink.
Liquid and solid carbon dioxide are important refrigerants, especially in the food industry, where they are employed during the transportation and storage of ice cream and other frozen foods. Solid carbon dioxide is called "dry ice" and is used for small shipments where refrigeration equipment is not practical.
Liquid carbon dioxide (industry nomenclature R744 / R-744) was used as a refrigerant prior to the discovery of R-12 and is likely to enjoy a renaissance due to environmental concerns. Its physical properties are highly favorable for cooling, refrigeration, and heating purposes, having a high volumetric cooling capacity. Due to its operation at pressures of up to 130 bars, CO2 systems require highly resistant components that have been already developed to serial production in many sectors. In car air conditioning, in more than 90% of all driving conditions, R744 operates more efficiently than systems using R-134a. Its environmental advantages (GWP of 1, non-ozone depleting, non-toxic, non-flammable) could make it the future working fluid to replace current HFCs in cars, supermarkets, hot water heat pumps, among others. Some applications: Coca-Cola has fielded CO2-based beverage coolers and the US Army is interested in CO2 refrigeration and heating technology.
By the end of 2007, the global car industry is expected to decide on the next-generation refrigerant in car air conditioning. CO2 is one discussed option.(see The Cool War)
see web page for more10
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