ENERGY CHANGES
Quiz
•
Science, Chemistry
•
12th Grade
•
Practice Problem
•
Hard
Jonathan Sarza
Used 47+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Is this equation endo- or exo-thermic?
PCl3 (s) + Cl2 (g) --> PCl5 (s) + energy
endothermic
exothermic
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Is this equation endo- or exo-thermic?
2KNO3 (s) + energy --> 2KNO2 (s) + O2
endothermic
exothermic
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When new chemical bonds form, energy ____________.
is taken into the system.
stays the same in the system.
is released from the system.
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
When the solids Ba(OH)2 and NH4SCN are mixed, a solution is produced, and the temperature drops. Which statement about the energetics of this reaction is correct?
The reaction is endothermic and ΔH is negative.
The reaction is exothermic and ΔH is negative.
The reaction is endothermic and ΔH is positive.
.The reaction is exothermic and ΔH is positive.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is TRUE about the bond-breaking process of the reactants?
It absorbs energy.
There's no energy involved.
It releases energy.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What type of reaction is represented by the graph above?
endothermic
exothermic
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What type of reaction is represented by the graph above?
endothermic
exothermic
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