3.1.7-8 Water & Ions

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11 Terms

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Hydrogen bond
Weak bonds between a slightly positively charged hydrogen atom in one molecule and a slightly negatively charged atom in another molecule.
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Dipolar
Having a positive and negative pole as a result of the uneven distribution of electrons within it.
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Metabolite
A substance involved in a metabolic reaction.
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Solvent
A liquid that other substances dissolve in.
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Solute
A substance that has been dissolved in another substance.
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Specific heat capacity
The heat energy needed to raise the temperature of 1g of a substance by 1°C.
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Latent heat of vaporisation
The heat energy required to change water to water vapour.
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Cohesion
The attraction between molecules of the same type e.g. two water molecules.
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Adhesion
The attraction between molecules of different type e.g. a water molecule and the wall of the xylem.
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Surface tension
The measure of how hard it is to break the surface of a liquid.
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Ion
An atom with a positive or negative charge due to losing or gaining electrons.