The potential energy of the activated complex is equal to area.
13C Reassessment Assignment

Quiz
•
Chemistry
•
10th Grade
•
Medium
Sara Jackowski
Used 3+ times
FREE Resource
30 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A) 3
B) 3+4
C) 1+2
D) 1
Answer explanation
The potential energy of the activated complex can be represented as the sum of areas 1 and 2, making option C) 1+2 the correct choice. This indicates that the total area corresponds to the potential energy.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The reaction of A + B → C + D is.
A) exothermic because it releases energy
B) exothermic because it absorbs energy
C) endothermic because it absorbs energy
D) endothermic because it releases energy
Answer explanation
The reaction A + B → C + D is exothermic because it releases energy. This means that the products (C and D) have lower energy than the reactants (A and B), resulting in a net release of energy.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Interval B represents the.
activation energy
reaction progress
potential energy
transition state
Answer explanation
Interval B represents the activation energy, which is the minimum energy required for a reaction to occur. It is the energy barrier that must be overcome for reactants to transform into products.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which diagram represents the potential energy of an exothermic reaction?
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A. The reaction involves only gaseous reactants and products.
B. The reaction products are carbon dioxide and water.
C. The reaction releases heat as it proceeds.
D. The reaction absorbs heat as it proceeds.
Answer explanation
This reaction is classified as exothermic because it releases heat as it proceeds, making option C the correct choice. The combustion of methane produces energy, which is characteristic of exothermic reactions.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What occurs when an atom of chlorine and an atom of hydrogen become a molecule of hydrogen chloride?
A chemical bond is broken and energy is released.
A chemical bond is formed and energy is released.
A chemical bond is broken and energy is absorbed.
A chemical bond is formed and energy is absorbed.
Answer explanation
When chlorine and hydrogen atoms combine to form hydrogen chloride, a chemical bond is formed. This process releases energy, making the correct choice: 'A chemical bond is formed and energy is released.'
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When an exothermic reaction occurs in a water solution, the temperature of the solution
increases
decreases
remains the same
fluctuates
Answer explanation
In an exothermic reaction, energy is released, usually in the form of heat, which increases the temperature of the surrounding water solution.
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