Physical Properties of Water. Physical Properties The observable and measurable traits that belong...

Physical Properties of Water

Physical Properties

The observable and measurable traits that belong to one kind of matter.

Ex. Clarity, Smell, Freezing point, boiling point…

(If there is a chemical change involved, we are outside the realm of physical properties)

Watery WondersWater can be found naturally in 3 states:

Universal Solvent: many substances dissolve easily into water

Varied Density: How much mass can fit into a given volume?

at room temperature = ~ 1.0 g/ml3

Heating it up

• As temperatures rise, water gets less dense (hot water molecules take up more room)

• 100 ⁰ C (212⁰ F) is water’s boiling point, transforming it into a gas called water vapor.

Cooling it down

• As water cools off it remains quite dense

• Freezing point @ 0⁰ C (32⁰ F) water becomes a low density solid

Sinking the Titanic…

• What large heavy object was responsible for sinking the Titanic……

If it was so heavy why was it floating????

Watch out its an iceberg!!!

• Water is unusual in that the solid form, ice, is less dense than the liquid form, which is why ice floats.

Acid or basic……

• Pure water has a neutral pH of 7, which is neither acidic nor basic!!

Bonus Question: What Bodily fluid copies water in it’s pH value?

Are you tense?

• Water has a very high surface tension. In other words, water is sticky and elastic, and

tends to clump together in drops rather than spread out in a thin film.

It’s getting hot in here……• Water has a high specific heat index. This means

that water can absorb a lot of heat before it begins to get hot.

• This is why water is valuable to industries and in your car's radiator as a coolant.

Dirty Water?

• Heterogeneous Mixtures: Obviously dirty

composition of the mixture is not uniform (evenly spread out) , often chunks or layers

• Homogeneous mixtures – evenly dispersed

Composition of the mixture is uniform throughout, blended into one appearance.