Lesson 4
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
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Structures and Properties of Water
*It has high boiling point and exist as liquid at room temperature *It has high specific heat which requires large amounts of heat before it vaporizes *It is the only substance that contracts when copied because of its more open structure in the solid form *It has high heat of vaporization *It has a high surface tension
How does water molecules disrupt/break the hydrogen bond?
By increasing temperature or hest energy
How does the kinetic energy of the molecules increase?
Kinetic energy of the molecules increased by increasing the temperature which to the escape in IMFA
Molecules are bound together by hydrogen bonding
It has a high boiling point and exist as liquid at room temperature
How does heat energy is distributed in the water molecules?
When the water molecules are heated enough to break its bond, the additional heat energy will be shared to other water molecules and collide to others
How does the bond between the water molecules can be renewed?
By lowering the temperature
What degrees does ice start to become less dense ?
4 degrees
What happened to the water molecules when its cooled?
The water molecules contracts
Why does the ice float in water?
Because ice has open structure due to repulsion of negative-charged oxygen atoms
Explains why the earth has minimal temperature variations that can affect the climate
It has high specific heat which requires large amounts pf heat before it vaporize
When cooled, more molecules are brought closer together and need to be accommodated in a smaller area
It is the only substance that contracts when cooled because of its more open structure in the solid form
This causes a large drop in temperature during evaporization
It has high heat of vaporization
Without hydrogen bonds, water boils at temp _______ degrees C and Freeze at _______ degrees C
-80, -100
Very high quantity of heat energy is need for evaporation. This amount of heat is called _____________________
heat of vaporization
A water property that helps to cool down the body of living organism
Evaporation cooling
Human heat and vaporize sweat and process of vaporizing, vaporize plant water is called __________
Transpiration
How does the body pf the living organism like human and plants cool down?
Water can evaporate, so, for human the body heat is used to vaporized sweat and for plants heat is also used to convert liquid water to water vapor that goes to the atmosphere
This allows water to move from the roots to the top of a very tall tree
It has a high surface tension
Causes the molecules on the surface to contract and to resist being stretched or broken
Inward net force
How does the barrier from the atmosphere and water formed?
The water molecules come in contact with each other that causes for the surface layer to be created