Difference between revisions of "Water"
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== Four properties of water: == | == Four properties of water: == | ||
| − | === cohesion= attraction of molecules to other molecules of the same kind. | + | === cohesion === |
| − | + | Cohesion=attraction of molecules to other molecules of the same kind. | |
| − | + | Adhesion= attraction of one kind of molecule to a different kind of molecule | |
| + | |||
| + | Capillary action = Upward motion of liquid. | ||
The experimental technique [[Lab techniques|chromatography]] can be used here. | The experimental technique [[Lab techniques|chromatography]] can be used here. | ||
=== '''ability to moderate temperature''' === | === '''ability to moderate temperature''' === | ||
| + | Calorie=unit of heat required to raise temperature of one gram of water by 1 degree celsius. | ||
| + | |||
| + | Specific heat= amount of heat that must be absorbed or lost for one gram of substance to change temp by 1 degree celsius. | ||
| + | |||
| + | Water has a high specific heat. One calorie per gram times degrees celsius. | ||
=== '''expansion upon freezing''' === | === '''expansion upon freezing''' === | ||
| + | Most substances become more dense as a solid than a liquid. Water becomes less dense as a solid than a liquid. This is due to [[Unit 1: Biochemistry|hydrogen bonding]]. | ||
=== '''versatility as a solvent''' === | === '''versatility as a solvent''' === | ||
| + | Solution= Completely homogenous liquid mixture of 2 or more substances. | ||
| + | |||
| + | Solvent= Dissolving agent of a solution. | ||
| + | Solute= Substance that is dissolved. | ||
Drunk by Michael Rosen | Drunk by Michael Rosen | ||
Latest revision as of 08:59, 15 October 2020
Water is a polar molecule.
Four properties of water:
cohesion
Cohesion=attraction of molecules to other molecules of the same kind.
Adhesion= attraction of one kind of molecule to a different kind of molecule
Capillary action = Upward motion of liquid.
The experimental technique chromatography can be used here.
ability to moderate temperature
Calorie=unit of heat required to raise temperature of one gram of water by 1 degree celsius.
Specific heat= amount of heat that must be absorbed or lost for one gram of substance to change temp by 1 degree celsius.
Water has a high specific heat. One calorie per gram times degrees celsius.
expansion upon freezing
Most substances become more dense as a solid than a liquid. Water becomes less dense as a solid than a liquid. This is due to hydrogen bonding.
versatility as a solvent
Solution= Completely homogenous liquid mixture of 2 or more substances.
Solvent= Dissolving agent of a solution.
Solute= Substance that is dissolved.
Drunk by Michael Rosen