The video explores phase changes using liquid nitrogen, demonstrating condensation, freezing, and sublimation. It includes experiments with balloons and a racket ball to illustrate these changes. The video also discusses intermolecular forces and their role in phase transitions, concluding with a look at sublimation and deposition, using dry ice and iodine as examples.

What is the boiling point of nitrogen at room temperature?

• 100 degrees Celsius

• 0 degrees Celsius

• -78 degrees Celsius

• -196 degrees Celsius

What phase change is observed when liquid nitrogen meets warm water?

• Condensation

• Freezing

• Melting

• Sublimation

Tags

NGSS.HS-PS3-4

What happens to a banana when placed in liquid nitrogen?

• It shatters like glass

• It melts

• It inflates

• It becomes more flexible

Tags

NGSS.HS-PS3-4

What effect does liquid nitrogen have on an air-filled balloon?

• It bursts immediately

• It inflates further

• It changes color

• It deflates and then re-inflates

Tags

NGSS.HS-PS3-4

What demonstrates the intermolecular forces in water?

• Shape change

• Color change

• Volume increase

• High boiling point

What is sublimation?

• Solid to liquid

• Gas to solid

• Liquid to gas

• Solid to gas without becoming liquid

Tags

NGSS.HS-PS3-4

Which substance is known to sublimate under normal conditions?

• Water

• Nitrogen

• Dry ice (solid CO2)

• Oxygen

What happens to the size of ice cubes in a freezer over time?

• They expand

• They change color

• They sublimate

• They melt

What phase change occurs when iodine is heated?

• Freezing

• Condensation

• Melting

• Sublimation

What is deposition?

• Solid to liquid

• Gas to solid

• Liquid to solid

• Gas to liquid

Tags

NGSS.HS-PS3-4