<P> At pressures below 5.13 atm and temperatures below − 56.4 ° C ( − 69.5 ° F ) ( the triple point ) , CO changes from a solid to a gas with no intervening liquid form , through a process called sublimation . The opposite process is called deposition , where CO changes from the gas to solid phase ( dry ice ) . At atmospheric pressure , sublimation / deposition occurs at − 78.5 ° C ( − 109.3 ° F ) or 194.65 K . </P>
<P> At pressures below 5.13 atm and temperatures below − 56.4 ° C ( − 69.5 ° F ) ( the triple point ) , CO changes from a solid to a gas with no intervening liquid form , through a process called sublimation . The opposite process is called deposition , where CO changes from the gas to solid phase ( dry ice ) . At atmospheric pressure , sublimation / deposition occurs at − 78.5 ° C ( − 109.3 ° F ) or 194.65 K . </P>
what changes carbon dioxide gas back into carbon in solid form
what changes carbon dioxide gas back into carbon in solid form
deposition
deposition