WorksheetsEntropy Review
Total questions: 12
Worksheet time: 9mins
Name
Class
Date
1.
What is a Spontaneous Change?
a)
a change that occurs by itself
b)
a change that needs a push
2.
Entropy is a state function
a)
False
b)
True
3.
In an exothermic reaction, heat is ...
a)
taken in or absorbed
b)
given out or released
4.
Entropy increases from solid, liquid to gas. Why?
a)
Molecular disorder increases
b)
Molecular randomness decreases
c)
Molecules are more energetic
d)
Molecules are more reactive
5.
What is the symbol for entropy?
a)
H
b)
G
c)
S
d)
E
6.
Which of these have a DECREASE in entropy?
a)
CaCO3(s) → CaO(s) + CO2(g)
b)
2NO2(g) → N2O4(g)
c)
2NH3(g) → 3H2(g) + N2(g)
d)
C6H6(l) → C6H6(g)
7.
The entropy will usually increase when
a)
a molecule is broken into two or more smaller molecules
b)
a reaction occurs that results in an increase in the number of moles of gas
c)
a solid changes to a liquid
d)
all of these
8.
For the following reaction indicate if entropy is increased or decreased. 2N2(g) + 3 H2(g) -------> 2 NH3(g)
a)
increase
b)
decrease
9.
Which of the following would have the highest entropy?
a)
A cold solid
b)
A hot liquid
c)
A hot gas
d)
A cold gas
10.
A reaction that releases energy is
a)
Exothermic
b)
Endothermic
c)
Could be either
11.
A reaction that absorbs energy is
a)
Exothermic
b)
Endothermic
c)
Could be either
12.
Which phase of matter has the greatest motion and least orderly arrangement?
a)
solid
b)
liquid
c)
gas
100 %
