Note from the author:
Properties (descriptions) of endothermic and exothermic reactions.
1
1
Chemical reactions don't need energy to break apart bonds.
True
False
2
1
In a chemical reactions new bonds form to make the products.
True
False
3
1
Energy cannot be created nor destroyed.
True
False
For the following questions choose whether or not the desription goes with endothermic reactions (A) or exothermic reactions (B).
4
1
More energy is released by products than is needed to break bonds.
A Endothermic
B Exothermic
5
1
Products have less energy than the reactants.
A Endothermic
B Exothermic
6
1
It literally means "taking in heat."
A Endothermic
B Exothermic
7
1
Energy is needed to keep the reaction going.
A Endothermic
B Exothermic
8
1
Reactions feel hot to us.
A Endothermic
B Exothermic
9
1
An example is baking soda and vinegar.
A Endothermic
B Exothermic
10
1
Reaction feels cold.
A Endothermic
B Exothermic
11
1
Wood burning is an example.
A Endothermic
B Exothermic
12
1
Products have more energy than the reactants.
A Endothermic
B Exothermic
13
1
Heat is absorbed.
A Endothermic
B Exothermic
14
1
Photosynthesis is an example.
A Endothermic
B Exothermic
15
1
Combustion reactions are examples.
A Endothermic
B Exothermic
16
1
This equation: Reactants→Products+Energy
A Endothermic
B Exothermic
17
1
Is the graph above respresentative of an endothermic or exothermic reaction?
A Endothermic
B Exothermic
18
1
From where does the energy for photosynthesis come?
lighting a match
the rain
the sun
19
1
During the photosynthesis reaction plants convert carbon dioxide and water to
glucose and carbon monoxide
glucose and oxygen
oxygen and water
oxygen and energy
20
1
The energy needed to start reactions is called
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