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- 1. Multiple Choice
In an exothermic reaction, heat is....
Absorbed
Released
- 2. Multiple Choice
In an endothermic reaction, heat is...
Absorbed
Released
- 3. Multiple Choice
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
- 4. Multiple Choice
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
- 5. Multiple Choice
When cooking eggs, is in endothermic or exothermic?
Endothermic
Exothermic
- 6. Multiple Choice
Is the evaporation of water endothermic or exothermic?
Endothermic
Exothermic
- 7. Multiple Choice
An iron nail getting rusty loses heat. Is the endothermic or exothermic?
Endothermic
Exothermic
- 8. Multiple ChoiceIf a chemical reaction is EXOTHERMIC, the temperature would....Stay the sameIncreaseDecrease
- 9. Multiple ChoiceIn an endothermic reaction the system is releasing energy.TrueFalse
- 10. Multiple Choice
Is respiration an Endothermic or an Exothermic reaction?EndothermicExothermic - 11. Multiple ChoiceIf they energy required to break the bonds is greater than the energy given out by making new bonds the reaction isExothermicEndothermicNeutralisation
- 12. Multiple Choice
Endo or exo?
Endo
Exo
- 13. Multiple ChoiceIs photosynthesis an exothermic or endothermic reaction?EndothermicExothermicNeither
- 14. Multiple ChoiceA student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true?
The temperature increased
It is an endothermic reactionIt is an exothermic reactionThe temperature decreased
- 15. Multiple Choice
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.
- 16. Multiple Choice
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.
- 17. Multiple Choice
The energy level of molecules will _________ during bond breaking and _________ during bond forming.
decrease, increase
increase, increase
increase, decrease
- 18. Multiple ChoiceWhat is the activation energy?The energy of the productsThe energy of the reactantsThe minimum energy needed by the reactants to form the products.The energy lost in the reaction
- 19. Multiple ChoiceWhich letter corresponds to the energy of the products?ABCD
- 20. Multiple ChoiceWhich letter corresponds to the energy of the reactants?ABCD
- 21. Multiple Choice
This energy level diagram is showing an ...
endothermic reaction
exothermic reaction
- 22. Multiple Choice
This energy level diagram is showing an ...
Endothermic reaction
Exothermic reaction
- 23. Multiple Choice
What is the label covered by the red box?
Reactant
Activation Energy
Products
Overall energy change
- 24. Multiple Choice
What is the label covered by the blue box?
Reactant
Activation Energy
Products
Overall energy change
- 25. Multiple Choice
What is the label covered by the purple box?
Reactant
Activation Energy
Products
Overall energy change
- 26. Multiple ChoiceIf ∆H is negative, the reaction is?exothermicendothermic
- 27. Multiple ChoiceΔH value in an endothermic reaction is a positive number.TrueFalse
- Answer choicesTagsAnswer choicesTags