phase changes examples

📚 Quick Study Guide

• 🧊 Melting: The phase change from solid to liquid. Occurs when a substance absorbs enough heat to reach its melting point.
• 🔥 Boiling (Vaporization): The phase change from liquid to gas. Happens when a liquid is heated to its boiling point.
• ❄️ Freezing: The phase change from liquid to solid. Occurs when a substance loses heat and its temperature drops to the freezing point.
• 💨 Condensation: The phase change from gas to liquid. Happens when a gas cools down and loses energy. Think of water droplets forming on a cold glass.
• ✨ Sublimation: The phase change directly from solid to gas, bypassing the liquid phase. Example: Dry ice.
• 🧊 Deposition: The phase change directly from gas to solid, bypassing the liquid phase. Example: Frost forming on a cold surface.
• 🌡️ Phase Diagram: A graph showing the conditions (temperature and pressure) at which different phases are thermodynamically stable.

Practice Quiz

1. Which phase change involves a substance changing from a liquid to a gas?
   1. Melting
   2. Freezing
   3. Boiling
   4. Condensation
2. What is the phase change called when a gas turns directly into a solid?
   1. Sublimation
   2. Melting
   3. Deposition
   4. Vaporization
3. Dry ice undergoing a transformation directly into gaseous carbon dioxide is an example of what phase change?
   1. Melting
   2. Freezing
   3. Condensation
   4. Sublimation
4. What happens to the temperature of a substance during a phase change (e.g., while ice is melting)?
   1. It increases
   2. It decreases
   3. It remains constant
   4. It fluctuates randomly
5. Which of the following phase changes involves the release of energy by the substance?
   1. Melting
   2. Boiling
   3. Sublimation
   4. Condensation
6. Frost forming on a window during a cold night is an example of:
   1. Sublimation
   2. Deposition
   3. Melting
   4. Condensation
7. What is the opposite of the melting phase change?
   1. Boiling
   2. Condensation
   3. Freezing
   4. Sublimation