Bond energy length

37
Molecular structure Bond Energy and Length

description

An introduction to the concepts of bond energy and length, focusing on the energy changes of two bonding hydrogen atoms at various distances apart.

Transcript of Bond energy length

Page 1: Bond energy length

Molecular structure

Bond Energy and Length

Page 2: Bond energy length

Che

mic

al p

oten

tial e

nerg

y

Distance between nuclei

H H

Page 3: Bond energy length

Che

mic

al p

oten

tial e

nerg

y

Distance between nuclei

H HH HH H

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+-

+-

bond length

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bond length

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bond length

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bond length bond length

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bond energy

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Chemical Potential Energy

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Chemical Potential Energy

work

ability to do

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Chemical Potential Energy

work

ability to do

done when

Page 14: Bond energy length

Chemical Potential Energy

work

ability to do

done when

force

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Chemical Potential Energy

work

ability to do

done when

forceacts through a

distance

Page 16: Bond energy length

Chemical Potential Energy

work

ability to do

done when

forceacts through a

distance

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Chemical Potential Energy

work

ability to do

done when

forceacts through a

distance

e.g.electrostatic

force

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Chemical Potential Energy

work

ability to do

done when

forceacts through a

distance

e.g.electrostatic

forcemay be

Page 19: Bond energy length

Chemical Potential Energy

work

ability to do

done when

forceacts through a

distance

e.g.electrostatic

forcemay be

attraction

Page 20: Bond energy length

Chemical Potential Energy

work

ability to do

done when

forceacts through a

distance

e.g.electrostatic

forcemay be

attraction repulsion

Page 21: Bond energy length

Chemical Potential Energy

work

ability to do

done when

forceacts through a

distance

e.g.electrostatic

forcemay be

attraction repulsion

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+-

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+

-

attractionattraction

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+-repulsion

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+-

+-repulsion

repulsion

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+-

+-repulsion

repulsion

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+

-

repulsionrepulsionattractionattraction

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+

-

attractionattraction

repulsionrepulsion

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+

-

Net attraction

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+-

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+-repulsion

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+-attraction

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+-

+-

Net repulsion

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+

-+ +

-

-