Review 1.A.5 Question Preview (ID: 45000)


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. TEACHERS: click here for quick copy question ID numbers.

A student burns a strip on magnesium. The magnesium gives of a bright flame and heat. This reaction is ______.
a) exothermic
b) endothermic
c)
d)

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
c)
d)

Energy is _______ when bonds are formed
a) absorbed
b) released
c)
d)

Energy is _______ when bonds break
a) absorbed
b) released
c)
d)

Which of the following is exothermic
a) freezing
b) melting
c)
d)

Products have a higher chemical energy
a) endothermic
b) exothermic
c) isothermic
d)

A reaction that gives off energy
a) exothermic
b) endothermic
c) isothermic
d)

A reaction that absorbs energy
a) exothermic
b) endothermic
c) isothermic
d)

Products have lower chemical energy than the reactants
a) exothermic
b) endothermic
c) isothermic
d)

When reactants have higher chemical energy than products the reaction is ______
a) exothermic
b) endothermic
c) isothermic
d)

Exothermic reaction containers will feel
a) cold
b) hot
c) impossible to tell
d)

Endothermic reaction containers will feel
a) cold
b) hot
c) impossible to tell
d)

Breaking bonds is ______
a) exothermic
b) endothermic
c) isothermic
d)

Making bonds is __________
a) exothermic
b) endothermic
c) isothermic
d)

If products have lower chemical energy than the reactants, the container will feel ____.
a) cold
b) hot
c) impossible to tell
d)

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