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WorksheetsThermo Concept Review
Total questions: 20
Worksheet time: 10mins
Which letter represents the forward activation energy ?
A
B
C
D
E
Which of the following is true of n endothermic reaction ?
Heat is considered a product
△H is always positive
Activation energy is small
Energy is always released
Which of the following is considered an endothermic reaction ?
A
B
C
D
Which of the following will be changed by adding a catalyst ?
II only
I only
I and III only
I and II only
Which of the following concentrations will exhibit the fastest reaction rate ?
A
B
C
D
Based on the diagram above, this reaction would be classified as...
An exothermic reaction
An endothermic reaction
A precipitation reaction
A synthesis reaction
Which of the following will cause equilibrium to shift to the left ?
Adding Sulfate ions ( SO4 -2 )
Removing Iron ( Fe )
Removing Copper ( Cu )
Adding Iron ( Fe )
Which of the following will cause an increase in temperature inside the reaction chamber ?
Increasing the pressure
Adding oxygen gas
Removing the nitrogen gas
Removing nitrogen monoxide gas
Which of the following exhibits the greatest decrease in entropy ?
A
B
C
D
What is the proper equation for calculating the forward activation energy , based on this energy diagram
Ea = 75 kj + 300 kj
Ea = 300 kj - 225 kj
Ea = 225 kj - 75 kj
Ea = 300 kj - 75 kj
Which of the following will exhibit the fastest rate of reaction ?
Adding broken pieces of an antacid tablet to a solution of 1.0 M HCl
Adding powdered antacid tablet to a solution of 1.0 M HCl
Adding a whole antacid tablet to a solution of 1.0 M HCl
Adding two antacid tablets to a solution of 1.0 M HCl
Which of the following changes will occur when carbon monoxide gas is added to the reaction chamber ?
No change will occur
Water vapor will decrease
Hydrogen gas will increase
Methane gas will increase
Which letter represents the enthalpy ?
A
B
C
D
E
Which letter represents the products ?
A
B
C
D
E
Increasing the temperature of a reaction causes ...
An increase in more effective collisions
An increase in the rate of reactions
An increase in the kinetic energy
An increase in all of the above
Which of the following will cause a decrease in the equilibrium concentration of the Cl2 gas ?
A decrease in temperature
An increase in temperature
The removal of PCl3 gas
The addition of PCl5 gas
Which of the following is a characteristic of an exothermic reaction ?
Enthalpy is always negative
Activation energy is small
The reaction gives off heat
All of the above
All of the following are characteristics of a catalyst EXCEPT ...
A catalyst lowers the activation energy by bringing the reactants together
A catalyst is chemically unchanged at the end of the reaction
A catalyst could either be a reactant or a product in a chemical reaction
A catalyst can be used to increase the rate of a chemical reaction
Reactions that absorb heat energy are called ...
Exothermic reactions
Endothermic reactions
Thermodynamic reactions
Precipitation reactions
Which of the following exhibit the highest amount of entropy ?
Solids and liquids
Liquids and aqueous ions
Liquids and gases
Gases and aqueous ions
