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Molecular Biology (2.2 Water (Transport in Blood Plasma (Sodium chloride…
Molecular Biology
2.2 Water
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- Water is made up of two hydrogen atoms covalently bonded to an oxygen atom (molecular formula = H2O)
- The oxygen atom is slightly negative (δ–) while the hydrogen atoms are slightly positive (δ+) hence a polar molecule
Cooling Body with Sweat
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This energy comes from the surface of the skin when it is hot, therefore when the sweat evaporates the skin is cooled
Because water has a high specific heat capacity, it absorbs a lot of thermal energy before it evaporates
Thus water functions as a highly effective coolant, making it the principal component of sweat
Properties of Water
This intermolecular bonding between water molecules gives water distinct properties not seen in other substances:
Thermal properties – High heat capacity, high latent heat vaporization, high b.p
Cohesive- hydrogen bond between water molecules
Adhesive- water molecules attract to different molecules
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