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Published byRachel Newsum Modified over 9 years ago
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Hand-in a paper with one of these explained: Use the KMT to explain why a.A balloon placed in the freezer would shrink b.A balloon in the microwave would pop.
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Changes in State Phase Changes
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Explain the process of melting, freezing, sublimation, and deposition in terms of KMT. Use the KMT to explain the processes of evaporation and condensation. Include: exothermic, endothermic Additional KEY Terms Characteristic PropertyVapour
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Melting or Fusion Solid is heated (energy absorbed - endothermic). Energy is utilized to reduce IMFs. Particles move more freely - liquid. Characteristic Property (melting point) unique to each substance. (s) (l)
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(l) (g) There are two types of vaporization: evaporation and boiling Vaporization Energy absorbed (endothermic) further break IMFs Particle motion increases - gases form Characteristic Property (boiling point)
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2. Evaporation: liquid particles on the surface have enough energy to overcome IMFs - vapour released. 1. Boiling - liquid particles at the bottom given enough energy to overcome IMFs - vapour released.
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Particles on the surface have fewer IMFs than other particles.
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Kinetic energy of the particles decrease as it cools. Particles slow down, IMFs take hold. Energy released (exothermic) to surroundings. (g) (l) Condensation
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(l) (s) Particles continue to lose energy (exothermic). Particle motion decreases further. IMFs increase and hold stronger. Particles arrange into unique solid pattern. Crystalline or amorphous Freezing or Solidification
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Sublimation Deposition (s) (g) (g) (s)
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decrease particle motion increase Kinetic Energy increase IMFs decrease IMFs decrease Kinetic Energy increase particle motion
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CAN YOU / HAVE YOU? Explain the process of melting, freezing, sublimation, and deposition in terms of KMT. Use the KMT to explain the processes of evaporation and condensation. Include: exothermic, endothermic Additional KEY Terms Characteristic PropertyVapour
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