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Review 1.A.5
Test Description: 9-12.PS1.A.5 Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.
Instructions: Answer all questions to get your test result.
1) Products have lower chemical energy than the reactants
A
isothermic
B
exothermic
C
endothermic
2) A reaction that gives off energy
A
endothermic
B
exothermic
C
isothermic
3) A reaction that absorbs energy
A
isothermic
B
endothermic
C
exothermic
4) Products have a higher chemical energy
A
exothermic
B
isothermic
C
endothermic
5) Which of the following is exothermic
A
melting
B
freezing
6) Energy is _______ when bonds break
A
released
B
absorbed
7) Energy is _______ when bonds are formed
A
released
B
absorbed
8) A student mixes baking soda and vinegar in a cup. They notice the cup feels cold to the touch. This reaction is _____
A
exothermic
B
endothermic
9) A student burns a strip on magnesium. The magnesium gives of a bright flame and heat. This reaction is ______.
A
endothermic
B
exothermic
10) When reactants have higher chemical energy than products the reaction is ______
A
exothermic
B
endothermic
C
isothermic
11) Exothermic reaction containers will feel
A
hot
B
impossible to tell
C
cold
12) Endothermic reaction containers will feel
A
cold
B
hot
C
impossible to tell
13) Breaking bonds is ______
A
exothermic
B
isothermic
C
endothermic
14) Making bonds is __________
A
endothermic
B
isothermic
C
exothermic
15) If products have lower chemical energy than the reactants, the container will feel ____.
A
cold
B
impossible to tell
C
hot
*select an answer for all questions
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