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Physical Changes of State all rights reserved
& Energy Flow
The amazing diagram above will help you understand physical changes of state and energy relationships between three major forms of matter, Solids, Liquids, and Gases! Use the diagram and your brain to help answer these mind boggling questions in complete, quality and correct sentences reflecting the question.
1. Tell what the process is called when a solid, such as ice, changes into a liquid.
2. Does a solid need to have energy added to it, or release energy, to become a liquid? Why?
3. Tell what the process is called when changing a gas, such as water vapor, into a liquid.
4. Does a gas need to have energy added to it, or release energy, to become a liquid?
5. Tell what the process is called when changing a solid, such as ice, into a gas.
6. Does a solid need to have energy added to it, or release energy, to become a gas? Why?
7. Would you add energy, or take energy away, from a liquid to change it to a solid?
8. Does the process of deposition require adding energy, or releasing energy, to change a gas to a solid?
9. A liter of Water is frozen, then melted. Does freezing the water release the same, more, or less energy than the ice created needs to add to melt back into water? Explain.
10. Explain which of the below processes is an energy losing process & which an energy gaining process?
11. Both the process of evaporation and the process of sublimation change matter into a gas. Tell which process needs to add more energy to do this conversion and tell why this is so.
EC Bonus: It is Boston in winter and ice is everywhere, including a big chunk outside your bedroom window. The day is sunny, but well below freezing. You measure the chunk of ice all day. At the end of the day the data shows the chunk is slowly getting smaller!! There is no water present. Explain which change of state process is occurring.
Matter and Change of State Project Page Home © 2010 John Schmied all rights reserved
