Properties of Water
- Water makes up about 55-78% of the human body.
- There is a positive charge are on the side where the hydrogen atoms are and a negative charge on the other side where the oxygen atom is.
- Since opposites electrical charges attract, water molecules tend to attract each other, making water 'sticky'.
- The melting point of water is 0 degrees Celsius, 32 degrees Fahrenheit, and 273.15 Kelvin. The boiling point of water is 99.98 degrees Celsius, 211.97 degrees Fahrenheit and 373.13 Kelvin.
- Water can change into all 3 phases, solid, liquid, and gas forms. Evaporation is when it goes from liquid to gas, condensation when it goes from gas to liquid.
- Water is unusual in that the solid form, ice, is less dense than water in liquid state, and that is why ice floats.
- Water has a high specific heat index. This means that water can absorb a lot of heat before it begins to get hot, that is why powerful computers are water cooled.
- Waters surface tension is very high, meaning its sticky and tends to clump together in drops rather than spread in a thin film. Surface tension means the cohesion of water molecules.