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Understanding the Phases of Water: Solid, Liquid, and Gas

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Discover the fascinating phases of water: solid, liquid, and gas. Water can transition between these states based on the energy of its molecules and temperature changes. As temperatures drop to 0°C, it freezes into a solid; at 0°C, ice melts back into a liquid. When heated to 100°C, it boils, transforming into gas. Learn about sublimation, where certain substances bypass the liquid phase entirely, such as dry ice changing directly from solid to gas. Explore the properties and changes of water and other substances in various states.

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Understanding the Phases of Water: Solid, Liquid, and Gas

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  1. The Phases of Water!

  2. WATER • DID YOU KNOW? Water can be classified as a SOLID, LIQUID, and GAS! • HOW???

  3. Water can be classified in all 3 phases of matter due to the amount of ENERGY that the molecules have! • Where does water get energy?

  4. Water gets energy from HEAT! Heatis thermalENERGY. • How does water change from each phase of matter to the next?

  5. FREEZING POINT = 0℃ • When the temperature of WATERreaches 0℃ the molecules have slowed down so much that they will start to form into a SOLID. • At what degrees does WATER change back to a LIQUID?

  6. MELTING POINT = 0℃ • When the temperature of ICE reaches 0℃ the molecules now are speeding up, starting to form into a SOLID. • At what degrees does WATER change to a GAS?

  7. BOILING POINT = 100℃ • When the temperature of WATER reaches 100℃ the molecules now are speeding up so much that the molecules form into aGAS. These GAS molecules are evaporating into the air. • Can matter change phases from a SOLID to a GASwithout becoming a LIQUID?

  8. Sublimation • Sublimation – The act of a material changing from the SOLID phase to the GAS phase where it does NOT go though the LIQUID phase.  • Example: As dry ice heats up, it turns right in to carbon dioxide gas. • How come dry ice can sublimate but not regular water ice? Sublimation

  9. Sublimation • The LIQUIDstate is required under normal earth atmosphere pressure.  There are some elements which, under earth’s atmospheric pressure, skip the liquid phase.  • Here is a list of some substances that sublimate on earth: • Dry ice, Naphthalene • Arsenic, Ferrocene

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