Unique Properties of Water

Questions and Answers

What is high specific heat?

Water can move up a small tube.

Water resists changes in temperature. (correct)

Water molecules sticking to each other.

Water sticks to other things.

What is cohesion?

When water molecules stick to each other.

What is adhesion?

When water sticks to other things.

What is capillary action?

When water can move up a small tube using adhesion and gravity. Signup and view all the answers

What are the three properties of water?

Capillary Action, Cohesion & Adhesion, and High Specific Heat. Signup and view all the answers

What is the balanced equation of a water molecule?

2H2 + O2 -> 2H2O Signup and view all the answers

What is polarity?

Oxygen has a stronger electronegativity than hydrogen, giving it a slightly negative charge. Signup and view all the answers

Why is ice less dense than water?

Water expands when it becomes a solid, causing its volume to be higher and mass to be smaller. Signup and view all the answers

Why is it important that ice floats instead of sinks?

If ice sinks, bodies of water would freeze completely, killing organisms. Signup and view all the answers

Why can water cause so many things to dissolve?

Water is polar, attracting different ions and molecules. Signup and view all the answers

How does a raindrop on a window illustrate cohesion and adhesion?

Water sticks to the window (adhesion) and to other raindrops (cohesion). Signup and view all the answers

How can a penny skipper float on water?

It uses cohesion and surface tension to stay afloat. Signup and view all the answers

How does soapy water break the surface tension?

Soap is non-polar and hydrophobic, disrupting cohesion. Signup and view all the answers

Study Notes

Unique Properties of Water

High Specific Heat: Water has a high specific heat, meaning it resists changes in temperature. Increased heat energy is required to raise its temperature, helping regulate cellular conditions.
Cohesion: Water molecules exhibit cohesion by sticking to each other, creating surface tension. This property allows small organisms, like spiders, to walk on water's surface.
Adhesion: Water molecules demonstrate adhesion by sticking to other surfaces. This property is essential for plants, as it facilitates the movement of water from roots to leaves.
Capillary Action: Water can travel upward through narrow spaces, like a straw, due to adhesion and gravity. This action is crucial for transporting water within plants.
Properties of Water: The three fundamental properties of water include Capillary Action, Cohesion & Adhesion, and High Specific Heat.
Balanced Equation of Water: The formation of water molecules is represented by the chemical equation: 2H₂ + O₂ → 2H₂O.
Covalent Bond Formation: Water molecules form covalent bonds through the sharing of electrons between hydrogen and oxygen.
Polarity: Water is polar, with oxygen having a higher electronegativity than hydrogen, giving it a slight negative charge. This polarity causes hydrogen bonds to form, with the positive hydrogen attracted to the negative oxygen.
Density of Ice: Ice is less dense than liquid water because it expands when frozen, resulting in greater volume and lower mass.
Importance of Ice Floating: Ice floats on water, preventing bodies of water from freezing solid. This phenomenon ensures that aquatic life can survive beneath a frozen surface.
Solvent Properties: Water's polarity allows it to dissolve many substances. Chloride (Cl) is attracted to hydrogen, while sodium (Na) is attracted to oxygen, facilitating the process of dissolution.
Raindrop Dynamics: A raindrop on a window illustrates cohesion (water sticking to itself) and adhesion (water sticking to the window), highlighting the interactions between different surfaces.
Penny Skipper's Floating: The penny skipper uses cohesion to float on water, where the attraction between hydrogen and oxygen creates surface tension, forming a film.
Effect of Soap on Surface Tension: Soapy water disrupts surface tension due to soap's non-polar nature, leading to a reduction in cohesion. This causes insects not to float and ultimately fall through the water.

Description

This quiz explores the fundamental properties of water, including its high specific heat, cohesion, adhesion, and capillary action. Understand how these properties impact biological systems and the environment. Test your knowledge on the unique characteristics that make water essential for life.