Outcome 5: energy and phase changes
Flashcard
•
Chemistry
•
11th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What happens to energy when a substance cools down?
Back
The substance loses energy.
2.
FLASHCARD QUESTION
Front
What are the points on a phase change diagram where a substance changes phase?
Back
The points where phase changes occur are indicated by segments such as B-C and D-E.
3.
FLASHCARD QUESTION
Front
Which line segment on a phase change diagram represents the solid state?
Back
The line segment A-B represents only the solid state.
4.
FLASHCARD QUESTION
Front
What does it indicate if a substance's temperature decreases but its phase remains the same?
Back
It indicates that the substance is cooling down without changing its phase.
5.
FLASHCARD QUESTION
Front
What is a phase change?
Back
A phase change is a transition of a substance from one state of matter to another, such as solid to liquid or liquid to gas.
6.
FLASHCARD QUESTION
Front
What is the significance of the flat regions on a phase change diagram?
Back
The flat regions indicate phase changes where temperature remains constant while energy is added or removed.
7.
FLASHCARD QUESTION
Front
What is the relationship between temperature and energy during a phase change?
Back
During a phase change, the temperature remains constant while energy is either absorbed or released.
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