CO2, or carbon dioxide, will freeze at -78 degrees Celsius at normal pressure. Find out how a change in pressure can change the freezing point of carbon dioxide with help from a science teacher and field biologist in this free video on chemistry.Click to see full answer. Also question is, what happens when a co2 tank freezes?When CO2 flows through a regulator from a cylinder heated by the sun or high air temperatures (and therefore at an increased pressure) and is reduced to a much lower working pressure, the difference in the high pressure inlet and the low pressure outlet causes a drop in temperature which can be great enough to cause can carbon dioxide be frozen? Dry ice is frozen carbon dioxide. A block of dry ice has a surface temperature of -109.3 degrees Fahrenheit (-78.5 degrees C). Dry ice also has the very nice feature of sublimation — as it breaks down, it turns directly into carbon dioxide gas rather than a liquid. Correspondingly, what happens when carbon dioxide freezes? Instead, at room temperature, it changes directly from a solid to a gas a process called sublimation. Carbon dioxide is a gas at room temperature, and it freezes solid at a much lower point than water: -109 degrees Fahrenheit (-78 C).What is the frozen form of carbon dioxide? Dry is is essentially a block of frozen carbon dioxide. In normal atmospheric conditions, dry ice undergoes a process of sublimation, which means as it breaks down, it turns directly from a solid to a gas.