AP Biology Topic 1.1 Properties of Water

Front

What is a hydrogen bond?

Back

A weak attraction between a slightly positive hydrogen atom of one molecule and a slightly negative atom (often oxygen or nitrogen) of another molecule.

Front

What type of bond connects hydrogen atoms to oxygen in a water molecule?

Back

Polar covalent bonds.

Front

What happens to temperature when water condenses and why?

Back

Temperature usually increases due to the release of heat by the formation of hydrogen bonds.

Front

What is the main reason for water's high specific heat?

Back

The absorption and release of heat when hydrogen bonds break and form.

Front

What bonds are broken when water vaporizes?

Back

Hydrogen bonds between water molecules.

Front

Define polar covalent bond.

Back

A type of bond where electrons are shared unequally between atoms, resulting in a molecule with a slight charge.

Front

What is the significance of water's high surface tension?

Back

It allows water to form droplets and enables small objects to float on its surface.

Front

Explain the term 'specific heat'.

Back

The amount of heat required to raise the temperature of a substance by one degree Celsius.

Front

What is the role of hydrogen bonds in water's properties?

Back

They contribute to water's high specific heat, surface tension, and solvent capabilities.

Front

What is meant by 'cohesion' in water?

Back

The attraction between water molecules due to hydrogen bonding, leading to high surface tension.