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CO2, or carbon dioxide, will freeze at -78 degrees Celsius at normal pressure.

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15y ago

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What is added to dry ice to make it change?

Essentially, dry ice will simply change from a solid straight to a gas through sublimation at room temperature. Nothing is needed to change the state of matter of dry ice except a higher temperature.


Is dry ice a chemical change or a physical change?

I just had this question for a chemistry and it is a physical change


Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?

The dry ice will sublimate, which means it will change from a solid directly to a gas without passing through the liquid state. This process occurs due to the low temperature of dry ice (-78.5°C) compared to room temperature, causing it to transition directly to carbon dioxide gas.


Can the temperature of dry ice change while experimenting?

Yes


What happens to the water temperature and water state as dry ice is added?

The temperature decrease and water can be transformed in ice.


Is dry ice turning into Carbon dioxide physical or chemical?

It is a physical change of state. CO2 solid (dry ice) is still CO2 as a gas.What does change is the physical heat content of the substance. By absorbing heat the physical state is changed from a solid at -109.3 degrees F to a gas at -109.3 degrees F. All the heat absorbed for the change of state is used by the molecules to expand in size (external energy), rather than to change in temperature. There is also a small amount of energy loss due to this change (entropy). Another calculation made is internal energy which is the internal molecular motive energy of the substance.


Can a solid change its state of matter straight to a gas?

Yes it can. It is called sublimation. Solid carbon dioxide (dry ice) sublimes at room temperature.


Is the temperature of ice water lower than the temperature of dry ice in alcohol?

No. The temperature of dry ice is far lower than that of ice water.


Is dry ice smoking at a concert is a physical or chemical change?

The process of dry ice sublimating, or turning directly from a solid to a gas, is a physical change. No new substances are formed, just a change in the physical state of the dry ice from solid to gas.


Why is dry ice evaporation a physical chainge?

Dry ice is a solid form of cooled carbon dioxide. When it reaches room temperature it changes to gaseous carbon dioxide. Since, there is no change in the chemical composition of dry ice, it is called a physical change.


What happens to the ice during no temperature change?

During no temperature change, the ice remains in a solid state. The molecules of the ice stay tightly packed together in a regular pattern, maintaining its structure. While there may not be a change in temperature, other factors such as pressure or surrounding conditions can affect the state of the ice.


Could dry ice change the temperature in a small room?

Perhaps a small amount.