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13 lis 2022 · Identify three special properties of water that make it unusual for a molecule of its size, and explain how these result from hydrogen bonding. Explain what is meant by hydrogen bonding and the molecular structural features that bring it about.
- Intermolecular Interactions
Figure \(\PageIndex{7}\): Dipole-Dipole Interaction between...
- Cellulose
Fiber in the Diet. Dietary fiber is the component in food...
- Hydrogen Bonding
Water is an ideal example of hydrogen bonding. Notice that...
- Structure of Water
Water is a simple molecule consisting of one oxygen atom...
- Intermolecular Interactions
In chemistry, a hydrogen bond (or H-bond) is primarily an electrostatic force of attraction between a hydrogen (H) atom which is covalently bonded to a more electronegative "donor" atom or group (Dn), and another electronegative atom bearing a lone pair of electrons—the hydrogen bond acceptor (Ac).
30 sty 2023 · Water is an ideal example of hydrogen bonding. Notice that each water molecule can potentially form four hydrogen bonds with surrounding water molecules: two with the hydrogen atoms and two with the with the oxygen atoms.
In water's hydrogen bonds, the hydrogen atom is covalently attached to the oxygen of a water molecule (492.2145 kJ ˣ mol −1 [350]) but has (optimally) an additional attraction (about 23.3 kJ mol −1 [168]. This is the energy (ΔH) required for breaking the bond and completely separating the atoms.
Hydrogen bonding between water molecules (intermolecular forces) explains many of the unusual properties of water, including high cohesion and adhesion, high surface tension, high specific heat and heat of vaporization.
Water is a simple molecule consisting of one oxygen atom bonded to two different hydrogen atoms. Because of the higher electronegativity of the oxygen atom, the bonds are polar covalent ( polar bonds ).
The hydrogen bonds in water allow water to absorb heat by breaking the hydrogen bonds without a large increase in temperature, giving water a high heat capacity. The 4 possible hydrogen bonds formed with a water molecule in ice.
