Chapter 11 Review for Test

Front

What explains the very high melting and boiling point of water?

Back

Strong hydrogen bonds between water molecules.

Front

Does HCl have hydrogen bonding?

Back

No.

Front

Water exists as a _____________ at 3 mmHg and 50 °C.

Back

Gas.

Front

What is the smallest repeating structure of solids?

Back

Unit cell.

Front

The weaker the intermolecular forces of a substance the _____________ the boiling point.

Back

Lower.

Front

Define hydrogen bonding.

Back

A strong type of dipole-dipole attraction between molecules that occurs when a hydrogen atom is bonded to a highly electronegative atom like oxygen, nitrogen, or fluorine.

Front

What is a unit cell in crystallography?

Back

The smallest repeating unit that shows the symmetry and structure of the entire crystal lattice.

Front

Explain the relationship between intermolecular forces and boiling point.

Back

Stronger intermolecular forces result in higher boiling points, while weaker forces lead to lower boiling points.

Front

What type of intermolecular force is present in water?

Back

Hydrogen bonding.

Front

What is the significance of the asymmetrical shape of water molecules?

Back

It contributes to the polarity of water, leading to strong hydrogen bonding.