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Worksheet 36 . Topic 9
Set C: Exothermic and Endothermic reactions Objective: To test your ability to determine if a
information about a reaction describes an
exothermic or endothermic reaction
Below, information or equation about a reaction is given. In the space write “exothermic” or
“endothermic “ to indicate the type of reaction.
19. A student measured the temperature of solution in a beaker
before and after a reaction. The temperature after the
o
reaction was 28 C higher than before the reaction.
20. The heat of reaction of an unknown chemical reaction is +113 KJ
Teacher Preview Copy
21. ∆ H of a reaction was calculated to be -45 KJ
22. In a laboratory procedure, a student dropped a piece of metal
into a solution and observed a reaction taking place in the test
tube. When he had touched the test tube, the test tube felt colder
than it was before the reaction. Need help? Study Book Pg 198 - 199 Set 18 - 20
23. An unknown solid was place in a test containing water that was
o
at 32 C. After the solid had completely dissolved, the temperature
o
of the liquid in the test tube was 5 C.
24. AB + Energy -------------------- > A + B
Teacher Preview Copy
25. 2CO + O2 --------------------- > 2CO2 + 566 KJ
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 75
Set C: Exothermic and Endothermic reactions Objective: To test your ability to determine if a
information about a reaction describes an
exothermic or endothermic reaction
Below, information or equation about a reaction is given. In the space write “exothermic” or
“endothermic “ to indicate the type of reaction.
19. A student measured the temperature of solution in a beaker
before and after a reaction. The temperature after the
o
reaction was 28 C higher than before the reaction.
20. The heat of reaction of an unknown chemical reaction is +113 KJ
Teacher Preview Copy
21. ∆ H of a reaction was calculated to be -45 KJ
22. In a laboratory procedure, a student dropped a piece of metal
into a solution and observed a reaction taking place in the test
tube. When he had touched the test tube, the test tube felt colder
than it was before the reaction. Need help? Study Book Pg 198 - 199 Set 18 - 20
23. An unknown solid was place in a test containing water that was
o
at 32 C. After the solid had completely dissolved, the temperature
o
of the liquid in the test tube was 5 C.
24. AB + Energy -------------------- > A + B
Teacher Preview Copy
25. 2CO + O2 --------------------- > 2CO2 + 566 KJ
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 75
