Energy Changes in Chemical Reactions
Interactive Video
•
Chemistry, Physics, Science
•
9th - 10th Grade
•
Practice Problem
•
Hard
Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary purpose of an energy level diagram?
To show the speed of a reaction
To determine the color of the products
To illustrate the energy changes during a reaction
To calculate the mass of reactants
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In an exothermic reaction, how does the energy level of the products compare to the reactants?
Higher than the reactants
Unrelated to the reactants
Equal to the reactants
Lower than the reactants
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does a negative delta H indicate in an exothermic reaction?
Energy is constant
Energy is released
Energy is absorbed
No energy change
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In an endothermic reaction, what happens to the energy level of the products compared to the reactants?
It fluctuates
It increases
It decreases
It remains the same
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does a positive delta H signify in an endothermic reaction?
Energy is constant
No energy change
Energy is released
Energy is absorbed
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is activation energy represented in an energy level diagram?
As a horizontal line
As the base of the curve
As a vertical line
As the peak of the curve
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If the activation energy is 800 kJ/mol and the initial energy is 200 kJ/mol, what is the final energy?
200 kJ/mol
600 kJ/mol
800 kJ/mol
1000 kJ/mol
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