The Phases of Water!

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# The Phases of Water! - PowerPoint PPT Presentation

The Phases of Water!. WATER. DID YOU KNOW ? Water can be classified as a SOLID , LIQUID , and GAS ! HOW???. 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 ?.

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### The Phases of Water!

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

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?

Water gets energy from HEAT! Heatis thermalENERGY.

• How does water change from each phase of matter to the next?
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?
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?
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?
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

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