What is the melting point of a substance?
Heating & Cooling Curves Review

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Chemistry
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9th - 12th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
The melting point is the temperature at which a solid becomes a liquid at a given pressure.
2.
FLASHCARD QUESTION
Front
What is the freezing point of a substance?
Back
The freezing point is the temperature at which a liquid becomes a solid at a given pressure.
3.
FLASHCARD QUESTION
Front
Describe the process occurring between letters D and E on a heating curve.
Back
The process occurring between letters D and E is evaporation, where a liquid turns into a gas.
4.
FLASHCARD QUESTION
Front
In which regions of a heating curve does the temperature increase?
Back
Temperature increases in regions 1, 3, and 5 of the heating curve.
5.
FLASHCARD QUESTION
Front
What happens to temperature during a phase change?
Back
During a phase change, the temperature remains constant while the substance transitions from one state to another.
6.
FLASHCARD QUESTION
Front
What is the significance of the plateau in a heating curve?
Back
The plateau indicates a phase change where the temperature remains constant as the substance absorbs or releases heat.
7.
FLASHCARD QUESTION
Front
How does the heating curve of NaCl(s) differ from that of water?
Back
The heating curve of NaCl(s) has a higher melting point (801°C) compared to water (0°C) due to stronger ionic bonds.
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