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Which of the following types of molecules lack hydrophilic domains?
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2. Water
Hydrophobic Effect
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Which of the following is false concerning H2O molecules in the hydration shell around nonpolar substances?
A
Cannot participate in normal hydrogen bonding.
B
Form stronger hydrogen bonds than free H2O
C
Less ordered & higher entropy than free H2O
D
Less options for orientations in 3D space than free H2O
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Understand the concept of a hydration shell: When nonpolar substances are introduced into water, water molecules form a structured shell around them, known as the hydration shell.
Recall the nature of hydrogen bonding: Water molecules can form hydrogen bonds with each other, which are relatively strong interactions that contribute to water's unique properties.
Consider the behavior of water molecules in the hydration shell: Around nonpolar substances, water molecules are more ordered because they cannot form hydrogen bonds with the nonpolar substance, leading to a structured arrangement.
Analyze the entropy of water molecules: In the hydration shell, water molecules have fewer options for orientation and movement compared to free water molecules, resulting in lower entropy.
Evaluate the statements: The statement 'Less ordered & higher entropy than free H2O' is false because water molecules in the hydration shell are more ordered and have lower entropy compared to free water molecules.
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