Science: Water and Its Three states.

"Taken from my textbook and PSLE Science Guide(2nd Edition), I complied some facts about 'Water and Its Three states' and decided to put this in this blog. I will be putting more facts from now on to make my revision easier and maybe put in English, Chinese and Maths, or even Korean, just the things I learnt, and upload it here. Note that the facts I upload is according to these 2 books and the facts are random.


Water and Its Three states:
Solids(ice) have definite shape and definite volume.
Liquid(water) have definite volume but no definite shape.
Air, or rather, gas, have no definite shape and no definite volume.
Water, air and solids(besides ice), are matter because it has mass and occupies space.
Water is able to change from one state to another by gaining and losing heat.

Freezing point of water and melting point of ice is 0 degrees.

Heat loss(Condensation):
Condensation = change in state of water from a gas(steam or water vapour) to a liquid(water) due to heat loss. It can occur at any temperature.
Steam is hot water vapour at 100 degrees. Like water vapour at any other temperature, it condenses when it meets a cooler suface.

Heat Gain-Melting(Solid to liquid)
When ice melts, it is gaining heat. However, the heat is used to help the particles in ice to break away from each other. Thus, the temperature of melting ice remains at 0 degrees, until all the ice has turned into water.

Heat Gain-Boiling(Liquid To Gas)

When water gains heat=> temperature rises.

Boiling= change in state of water from a liquid to a gas(steam) due to heat gain.

The boiling point of water is 100 degrees.

Water boils=>water gain heat. heat used=>the particles in water break away from each other. The temperature of boiling water remains at 100 degrees, until all the water has turned into steam.
Steam condenses =>water droplets form=> white clouds are observed

Steam is invisible.

Heat Gain-Evaporation(Liquid to Gas)

Evaporation->change from liquid(water) to a gas(water vapour) due to heat gain.

Evaporation happens all the time at any temperature below boiling point(100 degrees).

Evaporation=>happens all the time below 100 degrees

Boiling=>happens when water is heated up to 100 degrees.

Evaporation produces a cooling effect.

Water evaporates=>gains heat from its surroundings=>surroundings lose heat => produces a cooling effect.