Phase Changes and Temperature Effects

The video tutorial explains the different phase changes a pure compound can undergo, such as melting, boiling, condensation, freezing, sublimation, and deposition. It emphasizes that during these phase changes, the temperature of the compound remains constant. The tutorial uses the example of heating an ice cube to illustrate how temperature changes linearly until a phase change occurs, at which point it remains constant until the phase change is complete. The video also covers the heating curve of water, highlighting the importance of understanding temperature behavior during phase transitions.

What is the term for the phase change from solid to gas?

• Sublimation

• Boiling

• Condensation

• Melting

Which phase change occurs when a gas turns into a solid?

• Freezing

• Deposition

• Boiling

• Melting

During a phase change, what happens to the temperature of a pure compound?

• It fluctuates

• It decreases

• It remains constant

• It increases

What is the initial temperature of the ice cube in the example?

• 100°C

• -5°C

• 0°C

• 5°C

At what temperature does the ice cube start to melt?

• 100°C

• 50°C

• 0°C

• -5°C

What happens to the temperature of water as it heats from 0°C to 100°C?

• It remains constant

• It fluctuates

• It increases linearly

• It decreases

What is the significance of a plateau in the temperature graph during phase changes?

• Temperature decreases

• Temperature remains constant

• Temperature increases

• Temperature fluctuates

What phase change occurs when water reaches 100°C?

• Sublimation

• Condensation

• Boiling

• Freezing

Which direction represents the phase change from liquid to gas?

• Melt

• Freeze

• Boil

• Condensation

Why is it important to understand the constant temperature during phase changes?

• It is crucial for scientific experiments

• It is irrelevant

• It helps in cooking

• It affects weather patterns