quiz genchem

What are particles constantly doing in KMT?

Particles are constantly in motion.

How does temperature affect particles?

Higher temperature increases the speed (kinetic energy) of particles.

What do intermolecular forces determine?

The state of matter

What happens when two or more atoms interact?

They form a molecule.

What are some properties of liquids?

• Definite volume

• Indefinite shape

• Flows and takes the shape of its container

What happens to liquids when compressed?

They are slightly compressible but much less than gases.

Describe the molecular model of liquids.

Molecules are close together with moderate attractive forces and limited motion.

What are gases characterized by?

• No definite volume

• No definite shape

• Can expand or compress

What happens when a gas is cooled or compressed?

Molecules slow down and move closer together; attractive forces become significant.

What causes a gas to turn into a liquid?

When attractive forces between molecules exceed their kinetic energy.

Example of gas turning into liquid in nature?

The water cycle (condensation)

What makes the Kinetic Molecular Theory (KMT) significant?

: It helps explain how molecules behave in each phase

What are the “condensed phases” of matter?

Liquids and solids,

What does the Kinetic Molecular Model of liquids and solids emphasize?

• These forces influence the properties of the phase

How are gases described in terms of particle behavior?

move in random, ceaseless (constant) motion.

Why are attractive forces between gas particles considered negligible?

gas particles move so fast and are so far apart

What is the shape and volume of a gas?

No fixed shape, no fixed volume

What is the shape and volume of a liquid?

Fixed volume, but no fixed shape

What is the shape and volume of a solid?

Fixed shape and fixed volume.

What is the density of a gas?

Low

What is the density of a liquid?

Medium

What is the density of a solid?

High

Is gas compressible?

Yes, it is easy to compress.

Are liquids and solids compressible?

No

How do molecules move in a gas?

Random motion, high speed, traveling long distances between collisions.

How do molecules move in a liquid

Random motion, medium speed, particles are close and move past each other.

How do molecules move in a solid?

Vibrate, particles packed

What is the molecular arrangement in a gas?

Total disorder

What is the molecular arrangement in a liquid?

Some disorder

What is the molecular arrangement in a crystalline solid?

High ordered