Water An extremely unusual chemical. Covalent Bonds Share electrons “complete” one another...
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Transcript of Water An extremely unusual chemical. Covalent Bonds Share electrons “complete” one another...
![Page 1: Water An extremely unusual chemical. Covalent Bonds Share electrons “complete” one another Strong – hard to break.](https://reader034.fdocuments.us/reader034/viewer/2022052515/5a4d1b617f8b9ab0599ad7ec/html5/thumbnails/1.jpg)
Water
An extremely unusual chemical
![Page 2: Water An extremely unusual chemical. Covalent Bonds Share electrons “complete” one another Strong – hard to break.](https://reader034.fdocuments.us/reader034/viewer/2022052515/5a4d1b617f8b9ab0599ad7ec/html5/thumbnails/2.jpg)
Covalent Bonds
• Share electrons• “complete” one
another• Strong – hard to break
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Heat capacity
• Ability to hold onto a large amount of heat
• Takes a lot of energy to raise the temperature of water
• Importance to living things?
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Phoenix
Atlanta
![Page 5: Water An extremely unusual chemical. Covalent Bonds Share electrons “complete” one another Strong – hard to break.](https://reader034.fdocuments.us/reader034/viewer/2022052515/5a4d1b617f8b9ab0599ad7ec/html5/thumbnails/5.jpg)
Boise, Idaho
Providence, RI
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Average daily high: 225oFAverage daily low: -243oF
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So the big so what?
• Water in the atmosphere helps to moderate climate.– Kept within reasonable limits
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Latent Heat
• Water gives off a large amount of heat when it changes phases
• Importance to living things?
![Page 9: Water An extremely unusual chemical. Covalent Bonds Share electrons “complete” one another Strong – hard to break.](https://reader034.fdocuments.us/reader034/viewer/2022052515/5a4d1b617f8b9ab0599ad7ec/html5/thumbnails/9.jpg)
HOMEOSTASISMaintaining steady internal
conditions
![Page 10: Water An extremely unusual chemical. Covalent Bonds Share electrons “complete” one another Strong – hard to break.](https://reader034.fdocuments.us/reader034/viewer/2022052515/5a4d1b617f8b9ab0599ad7ec/html5/thumbnails/10.jpg)
But…all is not equal
• Unequal electronegativity– Ability to attract
electrons• Do not share electrons
equally
![Page 11: Water An extremely unusual chemical. Covalent Bonds Share electrons “complete” one another Strong – hard to break.](https://reader034.fdocuments.us/reader034/viewer/2022052515/5a4d1b617f8b9ab0599ad7ec/html5/thumbnails/11.jpg)
SO WHAT?
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Polar Covalent Bonds
• Unequal sharing of electrons
• Creates oppositely charged poles
• Opposites attract• Like a chemical magnet• Creates hydrogen
bonding
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So What?
• Universal Solvent– Can exchange nutrients– Can exchange waste
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So What?
• Medium for chemical reactions
• Participant in chemical reactions– Product of
photosynthesis = oxygen
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So What?
• Adhesion
![Page 16: Water An extremely unusual chemical. Covalent Bonds Share electrons “complete” one another Strong – hard to break.](https://reader034.fdocuments.us/reader034/viewer/2022052515/5a4d1b617f8b9ab0599ad7ec/html5/thumbnails/16.jpg)
So What?
• Cohesion
![Page 17: Water An extremely unusual chemical. Covalent Bonds Share electrons “complete” one another Strong – hard to break.](https://reader034.fdocuments.us/reader034/viewer/2022052515/5a4d1b617f8b9ab0599ad7ec/html5/thumbnails/17.jpg)
So what?
• Paper clip challenge– Addition of soap
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So What?
• Capillary Action
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So What?
• Density