Bio Quiz 3-Water properties

Water heat temp

Water has a high specific heat

Specific heat is the amount of heat a substance must absorb to increase 1 gram of the substance by 1 degree Celsius, so water is able to resist changes in temperature because it takes more energy to increase the temperature of water at slower rate.

Water heat vaporization

Water has a high heat vaporization

Evaporating water requires the absorption of a relatively large amount of heat, and water’s high specific heat prevents it from evaporating easily.

solvent

Water is the universal solvent

Dissolves all polar and ionic substances due to its polarity and hydrogen bonds

is Ice or water more dense?

Ice is less dense than water

When water freezes, the water molecules form a crystalline structure. The structure is maintained by hydrogen bonding. The orientation of hydrogen bonds causes molecules to push farther apart, which lowers the density.

Surface Tension

A property of the surface of liquid that allows it to resist an external force

Molecules of water tend to attract one another

Capillary Action

Due to cohesion and adhesion properties, water has the ability to flow upward against the force of gravity.

Example: transpiration is the process of the movement of water through plants.

results from the forces of cohesion and adhesion attraction

Cohesion (cohesive)

ability of water to stick together

Adhesion (adhesive)

ability of water to adhere to other molecules

Water structure is an example of what kind of bonding?

hydrogen bonding

Is water polar or non polar?

Polar because The oxygen atom in a molecule of water exerts a greater pull on the shared electrons than do the hydrogen atoms, one side of the molecule has a negative charge and other side has a positive charge. Thus, water polarity dependent on the the asymmetrical form, and is polar.