

bond energy lesson
Presentation
•
Chemistry
•
9th - 10th Grade
•
Practice Problem
•
Easy
+1
Standards-aligned
Lucy Brown
Used 1+ times
FREE Resource
6 Slides • 29 Questions
1
There is an inbetween stage in a reaction where reactants are separated into atoms.
This state is high energy and unstable so it requires effort to occur.
Activation energy
2
Labeling
Label the picture
breaking bonds
forming bonds
3
Labeling
Label the picture
forming bonds
breaking bonds
4
Reorder
Put the pictures in the order they occur for this reaction
5
Reorder
Put the pictures in the order they occur for this reaction
6
Each bond has an energy value in KJ/mol
This number is positive when breaking & negative when forming
Bond energy reflects bond strength. A single bonded C-C is 345 and C=C is 602.
7
Labeling
Match
absorb energy
release energy
8
Labeling
Match
absorb energy
release energy
9
Labeling
Match
endothermic
exothermic
10
Labeling
Match
endothermic
exothermic
11
Drag and Drop
12
Comparing breaking and forming for the same reaction
13
Labeling
Match
(+) positive number
(-) negative number
14
Labeling
Match
(+) positive number
(-) negative number
15
Forming water is overall exothermic 1362-1856 = -494
16
Drag and Drop
17
Fill in the Blanks
The O-H bond will form with an energy of
Type answer...
18
Fill in the Blanks
How many H-H bonds are in this equation ?
Type answer...
19
Fill in the Blanks
How many Cl-Cl bonds are in this equation ?
Type answer...
20
Fill in the Blanks
How many H-Cl bonds are in this equation ?
Type answer...
21
Fill in the Blanks
How many C-H bonds are in the reactants ?
Type answer...
22
Fill in the Blanks
How many C-H bonds are in the products
Type answer...
23
Fill in the Blanks
How many C-O bonds have to form in this reaction ?
Type answer...
24
Fill in the Blanks
What is the energy value for when the 2 C-O bonds form
Type answer...
25
Fill in the Blanks
Add up all the bond energies in the reactants
Type answer...
26
C-H
414 x4
+
O=O
498 x2
= 2652
27
Fill in the Blanks
Add up all the bond energies in the products
Type answer...
28
C=O
803 x2
+
O-H
464 x4
= 3462
29
Fill in the Blanks
if energy in = 2652
if energy out = -3462
Total energy change is Type answer...
30
Fill in the Blanks
Calculate the energy required to break these bonds
Type answer...
31
Fill in the Blanks
Bond breaking takes 3190.
Calculate the total energy change for this reaction
Type answer...
32
Fill in the Blanks
Calculate the overall energy change for this reaction
Type answer...
33
Drag and Drop
34
Fill in the Blanks
Calculate the overall energy change for this reaction
Type answer...
35
Drag and Drop
There is an inbetween stage in a reaction where reactants are separated into atoms.
This state is high energy and unstable so it requires effort to occur.
Activation energy
Show answer
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