What does a potential energy diagram illustrate in a chemical reaction?

Chemical Reactions and Enthalpy Concepts

Interactive Video
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Chemistry
•
9th - 10th Grade
•
Hard

Patricia Brown
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The color change of reactants
The speed of the reaction
The physical state of the products
The change in potential energy as reactants turn into products
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is enthalpy change calculated in a chemical reaction?
By multiplying the enthalpy of reactants and products
By subtracting the enthalpy of reactants from the enthalpy of products
By dividing the enthalpy of products by the enthalpy of reactants
By adding the enthalpy of reactants and products
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In an endothermic reaction, how does the energy level of products compare to reactants?
Products have a fluctuating energy level
Products have the same energy level as reactants
Products have a lower energy level than reactants
Products have a higher energy level than reactants
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the sign of enthalpy change in an endothermic reaction?
Zero
Undefined
Positive
Negative
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In an exothermic reaction, what happens to the energy of the system?
Energy is converted to mass
Energy remains constant
Energy is released
Energy is absorbed
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the sign of enthalpy change in an exothermic reaction?
Zero
Negative
Undefined
Positive
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the reaction A2 + B2 yields 2AB, what is the activated complex?
2AB
A2
B2
A2B2
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