Unit 5: Energy Exchange and Rate of Change

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•
Science
•
9th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is an endothermic reaction?
Back
A reaction that absorbs heat from its surroundings, resulting in a decrease in temperature.
2.
FLASHCARD QUESTION
Front
What is a characteristic of an endothermic reaction?
Back
The product is cold to the touch.
3.
FLASHCARD QUESTION
Front
What is an exothermic reaction?
Back
A reaction that releases heat to its surroundings, resulting in an increase in temperature.
4.
FLASHCARD QUESTION
Front
What is a characteristic of an exothermic reaction?
Back
The product is hot to the touch.
5.
FLASHCARD QUESTION
Front
What does concentration mean in chemistry?
Back
The amount of a substance in a given volume; how close particles are to each other.
6.
FLASHCARD QUESTION
Front
How does increasing concentration affect reaction rate?
Back
It increases the number of particles in the same space, leading to more frequent collisions.
7.
FLASHCARD QUESTION
Front
What is an example of an endothermic reaction?
Back
Cold packs, which absorb heat to provide cooling.
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