Liquid and Solid States:

the Uniqueness of Water

Lecture 15

The principal substance

Water on Mars

Colors are traditional

Colors are traditional

H2O as a source of inspiration

H2O as a source of inspiration

In what the uniqueness?great solvent properties due to polarity and hydrogen bonding ability;exceptional high specific heat capacity;high surface tension and capillarity;density differences of liquid and solid states.

Bent molecular shape

Unique solvent properties of waterresult from its polarity and

exceptional H-bonding ability.

Unique thermal properties of waterresult from its exceptionally high specific heat capacity and heat of vaporization.

Hydrogen bonds in oceans

Unique surface properties of waterare high surface tension and

high capillarity. These result from abundant H-bonds.

Capillary action of water

Density differences of liquid and solid

states of waterresult from large spaces

within ice.

Ice is lighter

Snow crystals

Snow crystals

THE END