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Name the two interactions between small molecules
1) long-ranged, electrostatic
2) van der waals
NaCl Charge-Charge interactions are much stronger in water than in vacuum
False
What does water in hydration shell tend to do?
Hydrogen bond strength:
5 - 10 kT
Beurteile
hydrogen bonds can occur intermolecularly and intramolecularly
H-bonds substantially contribute to the dielectric constant and the high boiling point of water
True
Beurteile
a reduction of entropy is energetically unfavorable
Water is always ordered the same (for example at hydrophilic or hydrophobic surfaces)
False
Describe water at extended hydrophilic surfaces
Does the tetrahedral arrangement between water molecules remain the same at hydrophilic surfaces?
tetrahedral arrangement between water molecules remain
What are the criteria for hydrophilicity?
offering of interaction possibilities with water molecules:
Describe the understanding from bottom-up.
§ The principle interactions between biological materials
(including cells) happen on the molecular level
§ Biological (macro)molecules are complicated structures
§ They cannot be described exactly by simple properties
§ To understand them, we need to know the behavior of their elemental building blocks
§ Importantly, everything happens in/with water (solvent)
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