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repository:phase_changes [2020/09/29 16:58] porcaro1 [Answer Key] |
repository:phase_changes [2020/09/29 17:10] (current) porcaro1 |
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| Below is a graph showing the heating curve for water. Take a look and use the [[https://trinket.io/glowscript/d406d0473c?showInstructions=true | code below]] and then answer the following questions that investigate the relationships between kinetic energy level, temperature, particle movement, etc. | Below is a graph showing the heating curve for water. Take a look and use the [[https://trinket.io/glowscript/d406d0473c?showInstructions=true | code below]] and then answer the following questions that investigate the relationships between kinetic energy level, temperature, particle movement, etc. | ||
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| + | {{:repository:water_curve.png?nolink&600|}} | ||
| - If the particle movement is low, the matter is in the %%_____%% state. | - If the particle movement is low, the matter is in the %%_____%% state. | ||
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| ==Post-Coding Questions== | ==Post-Coding Questions== | ||
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| + | {{ :repository:boiling.png?nolink&600|}} | ||
| Now that you understand how the program works to show the relationship between kinetic energy, particle movement, and temperature, it is time to apply your knowledge to improving and extending the power of the program. Develop answers to the following questions by modifying and improving the [[https://trinket.io/glowscript/d406d0473c?showInstructions=true | existing code]]. | Now that you understand how the program works to show the relationship between kinetic energy, particle movement, and temperature, it is time to apply your knowledge to improving and extending the power of the program. Develop answers to the following questions by modifying and improving the [[https://trinket.io/glowscript/d406d0473c?showInstructions=true | existing code]]. | ||
| - Do you think the movement of all particles is the same for all substances given the same energy? For example, should a particle of hydrogen (mass = 1.01 amu) move at the same velocity as a particle of nitrogen (mass = 14.01 amu) for a given temperature? | - Do you think the movement of all particles is the same for all substances given the same energy? For example, should a particle of hydrogen (mass = 1.01 amu) move at the same velocity as a particle of nitrogen (mass = 14.01 amu) for a given temperature? | ||
| - | - What are some of the key equations you would need t model the movement of the particles? | + | - What are some of the key equations you would need to model the movement of the particles? |
| - Which variables are constants and which can change? | - Which variables are constants and which can change? | ||
| - How could we show different movement for different types of substances? | - How could we show different movement for different types of substances? | ||
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| ==Pre-Coding Questions Part 2== | ==Pre-Coding Questions Part 2== | ||
| - | - Insert Graph | + | - {{:repository:heating_curve.jpg?nolink&600|}} |
| - The first plateau is where the matter melts (goes from solid to liquid) or freezes (goes from liquid to solid). Likewise, the second plateau is where the matter boils/vaporizes (goes from liquid to gas) or condenses (goes from gas to liquid) | - The first plateau is where the matter melts (goes from solid to liquid) or freezes (goes from liquid to solid). Likewise, the second plateau is where the matter boils/vaporizes (goes from liquid to gas) or condenses (goes from gas to liquid) | ||
| - See graph and previous answer | - See graph and previous answer | ||
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| - We can show different heating curves for different substances by changing the parameters defined in lines 56-62 (specific heat capacities, latent heat of fusion, melting point, etc.) | - We can show different heating curves for different substances by changing the parameters defined in lines 56-62 (specific heat capacities, latent heat of fusion, melting point, etc.) | ||
| - Here are some examples:{{:repository:heating_curves.jpg?nolink&600|}} | - Here are some examples:{{:repository:heating_curves.jpg?nolink&600|}} | ||
| - | - If the model occurred under 2 atmospheres, the melting/freezing point would lower and the boiling/condensing point would increase. We can look at a [[https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Supplemental_Modules_(Physical_and_Theoretical_Chemistry)/Physical_Properties_of_Matter/States_of_Matter/Phase_Transitions/Phase_Diagrams#:~:text=Phase%20diagram%20is%20a%20graphical,diagram%2C%20a%20phase%20change%20occurs. | phase diagram]] to see how pressure affects change of state for different substances. One equation that relates pressure, temperature, and volume is the ideal gas law: $PV=nRT$ (note that this only applies to gases) | + | - If the model occurred at 2 atmospheres of pressure, the melting/freezing point would lower and the boiling/condensing point would increase. We can look at a [[https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Supplemental_Modules_(Physical_and_Theoretical_Chemistry)/Physical_Properties_of_Matter/States_of_Matter/Phase_Transitions/Phase_Diagrams#:~:text=Phase%20diagram%20is%20a%20graphical,diagram%2C%20a%20phase%20change%20occurs. | phase diagram]] to see how pressure affects change of state for different substances. One equation that relates pressure, temperature, and volume is the ideal gas law: $PV=nRT$ (note that this only applies to gases) |
| ===Code=== | ===Code=== | ||
| [[https://trinket.io/glowscript/2f3f50f661?showInstructions=true | Link]] | [[https://trinket.io/glowscript/2f3f50f661?showInstructions=true | Link]] | ||