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27 questions
In an exothermic reaction, heat is....
Absorbed
Released
In an endothermic reaction, heat is...
Absorbed
Released
What happens in an endothermic reaction?
Moe energy is released
Less energy is released
The substance heats up
The temperature of the substance stays the same
What happens in an exothermic reaction?
More energy is released
Less energy is released
The substance's temperature stays the same
The substance gets colder
When cooking eggs, is in endothermic or exothermic?
Endothermic
Exothermic
Is the evaporation of water endothermic or exothermic?
Endothermic
Exothermic
An iron nail getting rusty loses heat. Is the endothermic or exothermic?
Endothermic
Exothermic
Endo or exo?
Endo
Exo
The temperature increased
The temperature decreased
Which of the following statement is true about the breaking of bonds between molecules?
To break a bond between molecules, energy must be released by the molecule
To break a bond between molecules, no energy is needed.
To break a bond between molecules, energy must be absorbed by the molecule.
Which of the following is true about the formation of bonds between molecules?
Energy is given off when bonds are formed between molecules.
Energy is absorbed by the molecule when bonds are formed.
Energy is neither given off nor absorbed when bonds are formed.
The energy level of molecules will _________ during bond breaking and _________ during bond forming.
decrease, increase
increase, increase
increase, decrease
This energy level diagram is showing an ...
endothermic reaction
exothermic reaction
This energy level diagram is showing an ...
Endothermic reaction
Exothermic reaction
What is the label covered by the red box?
Reactant
Activation Energy
Products
Overall energy change
What is the label covered by the blue box?
Reactant
Activation Energy
Products
Overall energy change
What is the label covered by the purple box?
Reactant
Activation Energy
Products
Overall energy change
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