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Eleanor - Dry Ice
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  • 1. Dry Ice By Eleanor Silverstein
  • 2. Basic Facts
    • Dry ice is very cold: -109.3  F or -78.5  C.
    • Dry ice melts into a gas, unlike regular ice.
    • It skips the liquid state all together.
    • Its so cold that touching it can cause frostbite or burns.
    • Create the cool “fog” effect that you see in plays or on Halloween.
  • 3. What is dry ice and what is it made out of?
    • Dry ice is a solid carbon dioxide.
    • When it reaches its solid state, the cooled liquid carbon dioxide is put under pressure.
  • 4. Why does dry ice smoke?
    • At -109.3  F the dry ice subliminates from the solid state into the gaseous state
    • It undergoes deposition from a gas to a liquid.
    • Dry ice evaporates in the gaseous state as well as the solid state.
    • It evaporates into a liquid and then rises into the clouds and then it rains down.
  • 5. Triple Point
    • A fixed temperature/pressure at which the three phases (liquid, solid, and gas) of that substance can coexist in equilibrium.
  • 6. VOCAB!!!
    • Sublimation - when a compound transfers from the solid to gas state without going through the liquid state.
    • Deposition - when the particles settle down onto a pre-existing surface.
  • 7. Sources:
    • &quot;How does dry ice work?.&quot; HowStuffWorks . Discovery Communications. <>.
    • &quot;What is triple point?.&quot; . <>.