Sublimation of Dry Ice #2

This is a basic introductory demonstration to the nature of dry ice (solid carbon dioxide), which sublimes (goes straight from being a solid to a gas) under standard conditions. Here I describe some of its properties and show how the gas it gives off as it sublimes creates a layer of gas on the bottom that makes it easy to slide it around due to low friction (like an air hockey table). I add to the table surface some water to speed up the sublimation process and make the gas more visible (you cannot actually see the gas, but you can see water vapor condense on it- like breath in cold air).

Category:

Science & Technology

Tags:

• dry
• ice
• CO2
• carbon
• dioxide
• sully
• russia
• chem
• chemistry
• demo
• demonstration
• sublime
• sublimation
• gas
• liquid
• solid
• states
• of
• matter
• water
• vapor
• H2O

[worldstuff0]

If dry ice doesn't melt then why is there water/ice on the table?

[mrericsully]

Some of it is real water (H2O) that I splash on the table to make more fog with the dry ice. Even without that though there will be ice on the table because the dry ice will freeze water vapor in the air and make ice/frost on the table.

[storealutes]

we used dry ice in science today but we didn't wear those gloves.