Elementary Productions: What are the properties of Dry Ice?

Dry Ice is solid Carbon Dioxide. It has a melting point of -78,5 degrees Celsius, except it doesn't melt. It undergoes, what is called, sublimation, meaning that it goes directly from being a solid to becoming a gas.
When you put Dry Ice in water, as water is a lot warmer than the Dry Ice, it induces sublimation, causing a fog of water vapor and Carbon Dioxide.

Warning: Science Content:
Also, not mentioned in the video, it chemically reacts with the water to form Carbonic acid (H2CO3). This is a very weak acid with a first dissociation constant of 6,36 (pKa)

Category:

Science & Technology

Tags:

• Dry
• Ice
• Chemistry
• Acetone
• Water
• Physical
• change
• awesome
• chemistry
• interesting
• experiment
• cool
• chemical

[kinjaljoshi89]

What is the minium Temprature you can maintain with Dry ICe. Can it be used as alternative to Liquid Nitrogen.

Kinjal

[mabakken]

As Dry Ice sublimes at -78,5 degrees Celsius at atmospheric pressure, this is the minimum temperature you can maintain with Dry Ice.

Liquid Nitrogen has a much lower boiling point, and for this reason, Dry Ice is unable to substitute it.

[monkeyjeroen]

hey mabakken!

i watched all youre movie's.

and i was wondering, how do you clean everything? or with what? or do you use new bottles and beakers everytime?

youre movies are very nice and we can learn much from you,

jeroen from holland

[mabakken]

Hi Jeroen.

It depends on what I need to clean out.

Manganese Dioxide is readily removed using Hydrogen Peroxide, whilst organic residue can be cleaned with concentrated Sodium Hydroxide.

Sometimes, the test- tubes and beakers become "uncleanable", and are therefore thrown away. =)

[sharinganx12]

Would this have the same effect that of liquid nitrogen?

[mabakken]

That depends on what you mean. Dry Ice is solid, liquid Nitrogen is liquid. Also, Dry Ice has a temperature of -78,5C, liquid Nitrogen has a temperature of -196C. This means that if you are to condense something with a melting point lower than -78C, you need liquid Nitrogen. =)

[MrMahirh]

instant fog

[monkeyjeroen]

Hello!

Do you know alot about fireworks to?

One thing i keep trying to find out is, how to make German Dark.

Becouse you are a professor you know it?

I have tried a lot of time's to find it out and tried a lot of diffirent things

But it all didnt work..

Gr Jeroen :)

[zasx20]

cool (wat i say is kind of ironic ,cool get it?) but it cood for keeping stuff cold and fresh!

[sharinganx12]

Allright thanks! It's fun to condense things with liquid nitrogen...