Hydrogen bonding

Hydrogen Bonding

A type of intermolecular force where polar molecules are attracted to each other, forming weak but important bonds.

Intermolecular Forces

Forces that occur between molecules, such as hydrogen bonds.

Covalent Bond

A strong bond formed by the sharing of electrons between atoms, different from hydrogen bonds.

Polar Molecules

Molecules that have a slight positive charge on one end and a slight negative charge on the other, allowing for hydrogen bonding.

Hydrogen Bond Representation

Represented with dashed lines (////) to signify attraction between molecules.

Requirements for Hydrogen Bonding

Must occur between two polar molecules containing O-H, F-H, or N-H bonds.

Role of Hydrogen Bonds in DNA

Hydrogen bonds hold the base pairs together, stabilizing the DNA structure.

Role of Hydrogen Bonds in Proteins

Help maintain the 3D functional shapes of proteins.

High Latent Heat

The energy required to change the state of a substance without increasing its temperature, such as melting ice or boiling water.

Latent Heat Energy in the Body

Evaporates water from sweat, helping to cool the body.

High Specific Heat

The amount of energy required to change the temperature of a substance, indicating how much energy is needed to raise the temperature.

High Surface Tension

Water's tendency to behave as if it has a skin on its surface, contracting to the smallest possible area.

Surfactant

A substance that reduces surface tension, necessary for smooth lung function and oxygen transfer into the bloodstream.

Importance of Surfactants

Essential for premature babies, as they are the last to develop, affecting their ability to breathe.

Water Cohesion

Water molecules' tendency to stick to themselves, contributing to high surface tension.