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Description: What are the special properties of water, and how do these properties allow it to be so important to living things?
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Chapter 3:
Water and Life
Properties of Water
● Cohesive/Adhesive
○ High surface tension
● Moderates Temperature
○ High heat capacity
○ High heat of vaporization
● Expands Upon Freezing
○ Ice floats in liquid water
Cohesion
water molecules are attracted to other water molecules
Adhesion
water is attracted to to other surfaces
Surface Tension
how difficult it is to break the surface of a liquid
Moderates Temperature
absorbs heat from warm air and releases heat to cool air
Specific Heat
amount of heat needed to increase temperature
Evaporative Cooling
as a liquid evaporates, the remaining surface cools
Expands Upon Freezing
hydrogen bonds in water are more ordered, allowing them to
take up less space
Ice Floats
the larger volume of ice reduces its density, allowing it to float in water
Solute
substance that gets dissolved in another substance
Solvent
substance that dissolves another substance
Water
is the solvent of life
...
m
Molecules dissolve well in
similar olecules
...
Description: What are the special properties of water, and how do these properties allow it to be so important to living things?