KMT Questions
Use the particle theory of matter to answer the
following questions:
1. Why is it easier to compress a gas than a liquid?
Because the spaces between particles in a gas are
much further apart than in solids and liquids that
intermolecular forces do not prevent gases from
being compressed.
2. Why must heat be removed to change liquid
water to ice?
In order for freezing to occur, the motion of
molecules must be slowed sufficiently for liquid
particles to interact and become solids in a crystal
structure, requiring the loss of heat energy.
3. How does air inside a balloon hold the rubber
out? That is, what causes pressure?
The collisions of gas particles with the walls of the
balloon cause pressure (a force per unit area),
resulting in a “blown up” balloon.
4. The air pressure inside an automobile tire
increases when the tire becomes warm. Why is
this so?
The friction created when the tire is in contact with
the road causes the temperature of the tire to increase,
resulting in faster moving particles of gas which
collide more with the tire walls generating a greater
tire pressure.
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