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WorksheetsEnergy in Chemical Reactions
Total questions: 13
Worksheet time: 7mins
Name
Class
Date
1.
What type of reaction is shown in the photo?
a)
Exothermic
b)
Isothermic
c)
Endothermic
d)
None of the above
2.
How does an exothermic reaction feel?
a)
cold
b)
warm
c)
You can't feel it
d)
None of the above
3.
What tool is used to measure the amount of heat in a material?
a)
meter stick
b)
spring scale
c)
graduated cylinder
d)
thermometer
4.
What are the reactants in the chemical equation below?
Na+Cl2 → 2NaCl
Na+Cl2 → 2NaCl
a)
Na and Cl
b)
Na only
c)
NaCl
d)
2NaCl
5.
What are the products in the chemical equation pictured?
a)
CO2
b)
CO2 and H2O
c)
CH4 and O2
d)
O2
6.
How do you know that energy is being absorbed during a chemical reaction?
a)
Temperature increases
b)
Temperature decreases
7.
A process in which complex compounds break down into simpler EX: rotting leaves or an old log
a)
activation
b)
decomposition
c)
exothermic
8.
Combustion is the fast reaction between ____and fuel
a)
oxygen
b)
products
9.
Is photosynthesis an exothermic or endothermic reaction?
a)
Endothermic
b)
Exothermic
10.
What happens to the bonds when 2 substances react
a)
They break so new bonds can form
b)
Nothing the bonds are too strong
c)
They change colour
11.
What type of reaction occurs in a hand warmer
a)
exothermic
b)
endothermic
12.
Is respiration an Endothermic or an Exothermic reaction?
a)
Endothermic
b)
Exothermic
13.
Hydrocarbons are compounds that contain
a)
Carbon and Nitrogen
b)
Carbon and Hydrogen
c)
Carbon, and Oxygen
d)
Carbon, Oxygen, and Hydrogen
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