States of Matter

Different states of matter were first described by the Romans.

• a.true
• b.false

One key point of the Kinetic Molecular Theory is:

• a.ice freezes at 0ºC
• b.atoms are solid billiard balls
• c.atoms possess an energy of motion
• d.molecules form solids

Intermolecular attractive forces include which of the following?

• a.hydrogen ions
• b.van der Waals forces
• c.Bose-Einstein attraction
• d.solids

The solid state of matter is unique because all molecular motion stops.

• a.true
• b.false

Liquids

• a.have a defined shape and volume
• b.have a defined shape but undefined volume
• c.have an undefined shape but defined volume
• d.have both undefined shape and volume

Gases can be compresed because:

• a.molecules of a gas are spread out and can be squeezed together
• b.molecules of gas can be compresed
• c.gases do not contain molecules

All molecular motions ceases at

• a.absolute zero
• b.-273.15ºC
• c.both of the above

Satyendra Bose predicted

• a.absolute zero
• b.plasmas
• c.that atoms would attain the same quantum-mechanical state at low temperature
• d.that solids, liquids, and gases were the only states of matter that could exist

Phase transitions occur at precise temperatures.

• a.true
• b.false

Why does temperature remain constant during a phase transition?

• a.because no energy is exchanged in the process
• b.because frozen substances always keep their surroundings cold
• c.because the energy gained or lost is all used by molecules transitioning from one phase to another
• d.because Albert Einstein predicted it