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Thermochemistry
Test Description: Thermochemistry and equilibrium activity
Instructions: Answer all questions to get your test result.
1) What is heat?
A
a measure of the amount of heat an object has
B
a change in temperature
C
fuel from an engine
D
Energy that is transferred between objects, represented by the letter q
2) What is temperature?
A
A reaction where energy is absorbed from the surroundings
B
Energy that is transferred between objects, represented by the letter q
C
Heat always travels from the warmer object to the cooler object
D
A measure of the amount of heat an object has
3) What is the Law of conservation of energy?
A
Energy that is transferred between objects, represented by the letter q
B
In any chemical or physical process energy is neither created nor destroyed.
C
Since it absorbs heat, it would feel cold
D
A reaction where energy is absorbed from the surroundings
4) What is an endothermic reaction?
A
A reaction where energy is released from the system
B
A reaction where energy is absorbed from the surroundings
C
A reaction in which energy is released to the surroundings
D
A measure of the amount of heat an object has
5) What would an exothermic reaction feel like?
A
A measure of the amount of heat an object has
B
Since it is releasing heat, it feels HOT
C
Since it absorbs heat, it would feel cold
D
Since it is releasing heat, it feels COLD
6) What is heat capacity?
A
heat required for a reaction for a chemical reaction
B
A reaction where energy is absorbed from the surroundings
C
In any chemical or physical process energy is neither created nor destroyed.
D
It is the amount of heat needed to increase the temperature of an object exactly 10C. Heat capacity depends on both mass and
7) What happens to temperature during a change of state?
A
While the substance is changing the temperature increases and decreases
B
While the substance is changing the temperature increases
C
While the substance is changing the temperature decreases
D
While the substance is changing the temperature remains constant
8) What is the activated complex?
A
products
B
reactants
C
energy changes in a reaction
D
Transition state (It is when the atoms have reached the highest energy. It only lasts a very short time. )
9) How does a catalyst affect the rate of reaction?
A
Catalysts lower the activation barrier making it easier for the atoms to reach the activation point.
B
Catalysts increases the activation barrier making it easier for the atoms to reach the activation point.
C
Catalysts has no affect on the rate of reaction
D
Catalysts lower the activation barrier making it harder for the atoms to reach the activation point.
10) When a reaction is at equilibrium what happens when more reactant is added?
A
It will not affect the reaction
B
There will be some reactant and some product
C
More reactant will cause the equilibrium to shift toward the product
D
There will be more product than reactant
*select an answer for all questions
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