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.