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Applied Chem Term 2 Final Review Flashcards | StudBud
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Applied Chem Term 2 Final Review
Applied Chem Term 2 Final Review
26 terms
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Periodic trends, bonding, chemical naming, the mole, thermodynamics, nuclear chemistry.
Flashcards
26 cards
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Practice quiz
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Questions
26
Answers
1
What can affect the rate of a reaction?
Nothing
Surface Area
Heat
Concentration
2
The rate of a reaction depends on __________.
collision energy
all choices
collision frequency
collision orientation
3
A reaction that is spontaneous...
Will proceed without outside intervention
Is also spontaneous in the reverse reaction
Is very rapid
Is far to the left at equilibrium
4
Why does the rate of reaction increase?
They get excited and eat more
The electrons become free
More frequent collisions
Collisions
5
What theory guides our understanding of the factors affecting reaction rate?
Pressure theory
Reaction theory
Activation theory
Collision theory
6
_____ is determined by adding up the atoms in one mole of a substance.
molar mass
molar sum
weight
molecular average
7
Why does increasing surface area increase reaction rate?
More opportunities for collisions
Greater energy of collisions
8
If the surroundings become
colder
after a reaction takes place, it must be a ____ reaction.
exothermic
entropic
chemical
endothermic
9
What type of reaction is this? 2 HBr + Cl
2
--> 2 HCl + Br
2
double replacement
single replacement
decomposition
synthesis
10
To balance an equation, the number of ___ must be the same on each side of the reaction arrow.
protons
each type of atom
electrons
compounds
11
Identify a reactant.
C
CO
Fe
Fe2O3
12
What coefficients are needed to balance this equation? __ H
2
+ __ O
2
--> __ H
2
O
1:1:1
1:2:1
2:1:2
2:1:1
13
The amount of heat needed to raise the temperature of one gram of a substance by 1
o
C is ______.
enthalpy
temperature
entropy
specific heat
14
Finding the molar mass of one atom in a compound, then dividing by the total mass is used for:
percent composition
mole conversions
molar volume
molar mass
15
If the value for q is negative in q = m*C*T, the reaction must be ____.
endothermic
entropic
chemical
exothermic
16
_____ is a measure of heat content of a system.
enthalpy
entropy
temperature
specific heat
17
According to Le Chatelier, if the concentration of O
2
is increased, the equilibrium will shift
to the left
to the right
in neither direction
18
Equations are balanced because they need to follow the _____.
law of conservation of mass
law of matter
laws of physics
law of conservation of energy
19
Removing Na
2
CO
3
to the mixture will shift the reaction ...
to the left
to the right
it won't shift
20
This type of reaction
releases
heat.
exothermic
endothermic
entalpic
entropic
21
What is the product of a chemical reaction?
A chicken McNugget
An element
The result of a chemical reaction
A compound
22
Lechatlier's principle states................
products remain the same
A system will shift to relieve stress
it speeds up the reaction
no net change takes place
23
What type of reaction is this? CH
4
+ 2 O
2
--> CO
2
+ 2 H
2
O
single replacement
combustion
synthesis
decomposition
24
_____ is a measure of randomness or disorder in a system.
enthalpy
temperature
entropy
heat
25
What is the molar mass of H
2
O rounded to the nearest whole number?
16
14
12
18
26
What type of reaction is this? FeO
2
--> Fe + O
2
decomposition
double replacement
synthesis
combustion
