
Chemical Reaction Energy Concepts
Interactive Video
•
Chemistry, Science, Physics
•
10th - 12th Grade
•
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 energy diagrams in chemistry?
To measure the speed of a reaction
To understand the thermodynamics and kinetics of a reaction
To determine the color change in a reaction
To calculate the exact amount of energy released
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a two-step exothermic reaction, what is true about the energy levels of reactants and products?
Reactants have higher energy than products
Reactants and products have the same energy
Products have higher energy than reactants
Energy levels are not important in exothermic reactions
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the y-axis represent in an energy diagram?
Time
Potential energy
Pressure
Temperature
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What must be true for a reaction to be considered exothermic?
The reactants and products have equal energy
The reaction absorbs energy
The reaction releases energy
The products have higher energy than the reactants
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of activation energy in a chemical reaction?
It is the energy that stops a reaction
It is the energy released during a reaction
It is the energy required to start a reaction
It determines the color of the reaction
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a transition state in a chemical reaction?
A state with the lowest energy
An intermediate state with the highest energy
The final state of the reaction
The initial state of the reaction
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is the first step in a reaction often the rate-determining step?
It is the last step
It has the highest activation energy
It is the fastest step
It has the lowest activation energy
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