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Physical Science #1
Chapter 2 and 3 & 8 Unit Test
Question | Answer |
---|---|
What is a physical property? | this has to do with how something changes its physical form but not its chemical composition. |
Is sublimation an endothermic or exothermic change? | endothermic |
Name the dimers. | HOFBrINCl |
How do you differentiate a colloid and a solution? | Tyndall Effect |
What factors affect solubility? | Polarity/Non-polarity,temperature,pressure |
the particles in a gas are in constant random motion called- | Brownian motion |
What is a precipitate and what does it indicate? | A precipitate is a solid(s) that form when 2 liquids or solids are mixed. It indicates a chemical change has occurred. |
why is light not considered matter? | It has volume but no mass. |
What is the difference between vaporization and evaporation. | vaporization only happens at the boiling point of material and evaporation happens at any temperature and this occurs at the surface. |
What happens to the temperature during a phase change?why? | the temperature stays the same. It stays the same during a phase change because only the energy it provides is used. |