Exam 3 - Changes and Bond Energy
Flashcard
•
Science
•
11th Grade
•
Practice Problem
•
Hard
+2
Standards-aligned
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is bond energy?
Back
Bond energy is the amount of energy required to break one mole of a bond in a molecule, measured in kilojoules per mole (kJ/mol).
Tags
NGSS.HS-PS1-4
2.
FLASHCARD QUESTION
Front
What is an exothermic reaction?
Back
An exothermic reaction is a chemical reaction that releases energy, usually in the form of heat, to the surroundings.
Tags
NGSS.HS-PS1-4
3.
FLASHCARD QUESTION
Front
What is an endothermic reaction?
Back
An endothermic reaction is a chemical reaction that absorbs energy from the surroundings, resulting in a decrease in temperature.
Tags
NGSS.HS-PS1-4
4.
FLASHCARD QUESTION
Front
How can you identify a chemical change?
Back
A chemical change can be identified by the formation of new substances, color change, gas production, or temperature change.
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
5.
FLASHCARD QUESTION
Front
What is the difference between physical and chemical changes?
Back
Physical changes alter the form of a substance but not its chemical composition, while chemical changes result in the formation of new substances.
Tags
NGSS.MS-PS1-5
6.
FLASHCARD QUESTION
Front
What does it mean if a reaction is described as 'endothermic'?
Back
It means that the reaction absorbs heat from the surroundings, leading to a decrease in temperature.
Tags
NGSS.HS-PS1-4
7.
FLASHCARD QUESTION
Front
What does it mean if a reaction is described as 'exothermic'?
Back
It means that the reaction releases heat to the surroundings, leading to an increase in temperature.
Tags
NGSS.HS-PS1-4
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