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- 1. Multiple ChoiceIn an exothermic reaction, heat is ...taken ingiven out
- 2. Multiple Choice
In an endothermic reaction, heat is ...
taken in
given out
- 3. Multiple Choice
If a chemical reaction is EXOTHERMIC, the temperature of the surrounding would....
Stay the same
Increase
Decrease
- 4. Multiple Choice
In an endothermic reaction the reaction is releasing energy.
True
False
- 5. Multiple ChoiceDuring an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______.WarmCold
- 6. Multiple Choice
The illustration shows cell respiration. Is the overall reaction of cell respiration an Endothermic or an Exothermic reaction?
Endothermic
Exothermic
- 7. Multiple Choice
A 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 did not change.
It is an endothermic reaction
It is an exothermic reaction
Energy is released from the reaction into the surrounding.
- 8. Multiple Choice
Baking bread and cooking an egg require an input of heat. These would be examples of....?
Endothermic processes
Exothermic processess
None of these
- 9. Multiple Choice
Photosynthesis takes place inside of leaf cells. Sunlight is required. Is this an Exothermic or an Endothermic reaction?
Endothermic
Exothermic
- 10. Multiple ChoiceWhat type of reaction is shown in the photo?ExothermicIsothermicEndothermicNone of the above
- 11. Multiple Choice
What type of reaction occurs in a hand warmer?
exothermic
endothermic
- 12. Multiple ChoiceHave you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?It is an exothermic reactionIt is an endothermic reactionIt is made of iceIt is dissolving your mouth
- 13. Multiple Choice
What instrument would you use to detect an endothermic or exothermic reaction?
triple beam balance
ruler
thermometer
- 14. Multiple ChoiceWhich of the following is a sign that a chemical reaction has occurred?change in shapemeltingbubbles of gas appeardissolving
- 15. Multiple Choice
During chemical reactions, bonds are...
broken only
formed only
both broken and formed
none of the above are correct
- 16. Multiple Choice
It takes energy to ________________ bonds.
break
form
- 17. Multiple Choice
Energy is released when bonds are _________________.
Broken
Formed
- 18. Multiple Choice
During a particular chemical reaction it takes 100 Kj of energy to break all the bonds and 150 Kj of energy is released when the new bonds form. Which is true about the overall reaction?
It is endothermic and absorbs energy.
It is exothermic and releases 150 Kj
It is exothermic and releases 50 Kj
It is endothermic and releases energy.
- 19. Multiple Choice
The bond energy to break a C-H bond is about 400 Kj. How much energy will it take to break all the bonds in methane (CH4)?
About 800
About 1600
About 3000
Way more than 3000
- 20. Multiple Choice
The bond energy in a S=O bond is a little more than 100 Kj. If the molecule SO2 is made, how much energy is released during the formation of these bonds?
About 50
About 100
About 200
About 400
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