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WorksheetsEndothermic & Exothermic
Total questions: 26
Worksheet time: 56mins
Name
Class
Date
1.
What is an endothermic reaction
a)
A reaction where energy is realesed to its
b)
A reaction where energy is absorbed from its surroundings
2.
What is an exothermic reaction
a)
A reaction where energy is released to its surroundings
b)
A reaction where energy is absorbed from its surroundings
3.
What is involved in a chemical reaction
a)
The breaking of chemical bonds in the product
b)
The breaking of chemical bonds in the reactant
c)
The forming of chemical bonds in the reactant
4.
Is energy created during an exothermic reaction
a)
Yes
b)
No
c)
Sometimes
d)
Most times
5.
Is the combustion of propane endothermic or exothermic
a)
Endothermic
b)
Exothermic
6.
This graph is an energy diagram for a chemical reaction. Which is true of this type of reaction?
a)
More energy is required to break reactant bonds than is released when product bonds form
b)
Less energy is required to break reactant bonds than is released when product bonds form
c)
The bonds of the reactants do not require energy to break because the reaction releases energy
7.
What type of reactions require energy in order to start?
a)
neither endothermic nor exothermic reactions
b)
endothermic reactions only
c)
exothermic reactions only
d)
both endothermic and exothermic reactions
8.
What is the activation energy?
a)
The energy of the products
b)
The energy of the reactants
c)
The minimum energy needed by the reactants to form the products.
d)
The energy lost in the reaction
9.
Breaking bonds
a)
Endothermic
b)
Exothermic
10.
Forming bonds
a)
Endothermic
b)
Exothermic
11.
Energy in exothermic reactions are
a)
released
b)
absorbed
12.
What type of reaction occurs in a hand warmer
a)
exothermic
b)
endothermic
13.
In an endothermic reaction, heat is ,,,
a)
taken in
b)
given out
14.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
15.
If a chemical reaction is EXOTHERMIC, the temperature would....
a)
Stay the same
b)
Increase
c)
Decrease
16.
When iron nails get rusty, heat is released. What process is this?
a)
Exothermic
b)
Endothermic
17.
In an endothermic reaction the system is releasing energy.
a)
True
b)
False
18.
Is the combustion of gasoline endothermic or exothermic?
a)
Endothermic
b)
Exothermic
19.
During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______.
a)
Warm
b)
Cold
20.
Is photosynthesis an exothermic or endothermic reaction?
a)
Endothermic
b)
Exothermic
21.
Is respiration an Endothermic or an Exothermic reaction?
a)
Endothermic
b)
Exothermic
22.
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
23.
If they energy required to break the bonds is greater than the energy given out by making new bonds the reaction is
a)
Exothermic
b)
Endothermic
c)
Neutralisation
24.
If they energy required to break the bonds is less than the energy given out by making new bonds the reaction is
a)
Exothermic
b)
Endothermic
c)
Neutralisation
25.
Is this an endothermic or exothermic reaction?
a)
Endothermic
b)
Exothermic
26.
Is this an endothermic or an exothermic reaction?
a)
Endothermic
b)
Exothermic
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