3.1.7 Water Flashcards

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1
Q

Properties of water

A
  • metabolite in metabolic reactions
  • good solvent
  • relatively high heat capacity
  • relatively large latent heat of vaporisation
  • strong cohesion between water molecules
  • water is less dense as a solid
  • transparent to light
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2
Q

Properties of water

metabolite in metabolic reactions

A

e.g. hydrolysis, condensation

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3
Q

Properties of water

good solvent

A
  • can dissolve polar substances

e. g. O2, CO2, ATP, amino acids (hydrophilic)

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4
Q

Properties of water

relatively high heat capacity

A

-water absorbs/loses a lot of heat before its temperature changes
└lot of energy to break H bonds
-can buffer temp changes ion habitats

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5
Q

Properties of water

relatively large latent heat of vaporisation

A

-water absorbs a large around of energy before turning into water vapour
=cooling effect with little loss of water through evaporation

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6
Q

Properties of water

strong cohesion between water molecules

A

attraction between particles of the same substance

  • allows unbroken columns of water to rise up the xylem as a result of transpiration
  • produces surface tension where water meets air
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7
Q

Water bonding

A

Hydrogen bonding

-slightly positive hydrogen attracted to slightly negative oxygen

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