1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
DiKsa [7]
3 years ago
9

PLEASE PLEASE PLEASE HELP ME!?!?!? SIMPLE TWO QUESTIONS PLEASE HELP. ILL GIVE POINTS AND BRAINLY

Biology
1 answer:
Sidana [21]3 years ago
4 0

 

1. Water's Attraction to Other Polar Molecules

Cohesion

Cohesion, otherwise known as water's attraction to other water molecules, is one of the major properties of water. Water's polarity lends it to be attracted to other water molecules. The hydrogen bonds in water hold other water molecules together. Due to water's cohesiveness:

Liquid water has surface tension. This allows for insects, such as Water Striders, to walk on water.

Water is a liquid at moderate temperatures, and not a gas.

Adhesion

Water's attraction between molecules of a different substance is called adhesion. Water is adhesive to any molecule it can form hydrogen bonds with. Due to water's adhesiveness:

Capillary action occurs. For example, when you have a narrow tube in water, the water will rise up the tube because of water's adhesiveness to the glass "climbing" up the tube.

2. Water's High-Specific Heat

Water can moderate temperature because of the two properties: high-specific heat and the high heat of vaporization.

High-specific heat is the amount of energy that is absorbed or lost by one gram of a substance to change the temperature by 1 degree celsius. Water molecules form a lot of hydrogen bonds between one another. In turn, a lot of energy is needed to break down those bonds. Breaking the bonds allows individual water molecules to move freely about and have a higher temperature. In other words: if there are a lot of individual water molecules moving about, they’ll create more friction and more heat, which means a higher temperature.

The hydrogen bonds between water molecules absorb the heat when they break and release heat when they form, which minimizes temperature changes. Water helps maintain a moderate temperature of organisms and environments.

Water takes a long time to heat up, and holds its temperature longer when heat is not applied.

3. Water's High Heat of Evaporation

Water's high heat of vaporization is the other property responsible for its ability to moderate temperature.

Water's high heat of evaporation is basically the amount of heat energy needed to change a gram of liquid into gas. Water also needs a lot of energy in order to break down the hydrogen bonds. The evaporation of water off a surface causes a cooling effect. Much like among humans—when we get hot, or energy inside our body is breaking chemical bonds, we sweat as a cooling effect. In this case, the same process occurs: as the water evaporates off the the surface of the skin, it cools down the surface.

4. The Lower Density of Ice

At cooler temperatures, the hydrogen bonds of water molecules form ice crystals. The hydrogen bonds are more stable and will maintain its crystal-like shape. Ice—the solid form of water—is less dense than water because of the hydrogen bonds being spaced out and being relatively apart. The low density is what allows icebergs to float and are the reason that only the top part of lakes are frozen.

5. Water's High Polarity

Water is a polar molecule that has a high level of polarity and attraction to ions and other polar molecules.

Water can form hydrogen bonds, which make it a powerful solvent. Water molecules are attracted to other molecules that contain a full charge, like an ion, a partial charge, or polar. Salt (NA+ CL-) dissolves in water. Water molecules surround the salt molecules and separate the NA+ from the CL- by forming hydration shells around those two individual ions.

You might be interested in
By which process do plants obtain carbon from the atmosphere
kari74 [83]
Photosynthies or however you spell that
3 0
3 years ago
Read 2 more answers
Whats the general relationship between mass and gravitational force
lions [1.4K]

Answer:

The gravitational force on an object increases as the object’s mass increases.

Explanation:

5 0
3 years ago
Is fish good for lowering blood pressure answers?
Degger [83]
Fish is good to lowering blood pressure because contain vitamin D, and this hormone-like vitamin has properties that can lower blood pressure.
7 0
3 years ago
PLEASE HELP!!!! Which of the following were responsible for changing the oxygen content in
Nesterboy [21]

Im not 100% sure but the best answer I can give is Prokaryotes because they came to be around the time oxygen did as well.

4 0
2 years ago
Read 2 more answers
compara la funcion del ADN con los planos de una casa. ¿como saben las celulas de un organismo que parte del cuerpo pueden tomar
mel-nik [20]
Gruroeovrifoevrvdvheuehe. Thririepepls ;!
7 0
3 years ago
Other questions:
  • Why do microbiologists need to isolate bacterial colonies from a specimen? quzilet?
    15·2 answers
  • Theory of macroeconomics dominated the Reagan administration.
    7·2 answers
  • How are babies made? i need this for health class.
    5·2 answers
  • If both maize and teosinte are grown in the wild, which species is more likely to proliferate? Why?
    5·1 answer
  • Яке біологічне значення сну​
    12·1 answer
  • Please help me with this
    9·1 answer
  • 3 different solutions to solve we protect the arctic habitat of polar bears from change? explained​
    13·1 answer
  • Do human blood cells contain a cell wall?
    5·2 answers
  • A population of animals has a short gestational period and travels in large groups. How will this affect the population size?
    6·1 answer
  • ANSWER IS IN PHOTO!!!!!!!!!
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!