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Questions and Answers
What is latent heat of fusion?
What is latent heat of fusion?
- Energy released during the melting of a solid
- Energy required to change a substance from liquid to solid without temperature change (correct)
- Energy required to change a substance from solid to gas
- Energy required to raise the temperature of a liquid
Why does the temperature remain constant during the solidification of a liquid?
Why does the temperature remain constant during the solidification of a liquid?
- The energy is stored in the molecules as potential energy
- The solidification process generates additional heat
- The release of latent heat is used entirely for forming bonds (correct)
- The heat is absorbed by the surroundings only
What happens to the temperature of a liquid while it is transitioning to a solid?
What happens to the temperature of a liquid while it is transitioning to a solid?
- It continuously decreases until solidification is complete
- It fluctuates depending on the external conditions
- It remains constant until the entire liquid solidifies (correct)
- It briefly increases before decreasing again
What occurs to the energy released during a liquid's solidification?
What occurs to the energy released during a liquid's solidification?
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Once the solidification of a substance is complete, what happens to the temperature if more heat is removed?
Once the solidification of a substance is complete, what happens to the temperature if more heat is removed?
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Study Notes
Latent Heat of Fusion
- The heat required to change a substance from solid to liquid (melting) or liquid to solid (solidification) without changing its temperature.
Constant Temperature During Solidification
- During solidification, the liquid releases latent heat of fusion, which is used to form bonds between molecules as they transition from liquid to solid state.
- This energy release is used specifically for the phase change, not to increase the temperature.
- The temperature remains constant until the entire liquid has solidified.
Energy Transfer
- As the liquid cools and begins to solidify, it releases heat to the surroundings.
- This heat release does not result in a temperature change until the entire liquid has solidified.
- Once solidification is complete, further heat removal will lower the temperature of the solid.
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