Fire Extinguisher Sublimation

The video tutorial explains the process of sublimation, where certain substances transition directly from a solid to a gas, bypassing the liquid stage. Using a carbon dioxide fire extinguisher, the experiment demonstrates this phenomenon by showing how solid CO2 turns into gas without becoming liquid. The video details the setup, execution, and scientific explanation of the experiment, highlighting the weak molecular bonds in solid CO2 that allow for sublimation. The tutorial concludes with a summary of the key concepts and observations from the experiment.

What is the process called when a substance transitions directly from a solid to a gas?

• Sublimation

• Evaporation

• Condensation

• Freezing

In the experiment, what is used to demonstrate the sublimation of carbon dioxide?

• A Bunsen burner

• A carbon dioxide fire extinguisher

• A block of dry ice

• A beaker of water

What happens to the icy residue on the cloth during the experiment?

• It disappears without leaving wetness

• It turns into a liquid

• It melts into water

• It remains solid

Why does carbon dioxide skip the liquid phase when it sublimates?

• Due to low atmospheric pressure

• Because of weak molecular bonds

• Due to high room temperature

• Because of strong molecular bonds

At what temperature does carbon dioxide become solid in the experiment?

• 0°C

• -100°C

• -78°C

• 100°C