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Chemistry: Kinetic Molecular Theory
Name:____________________
Per:____
Directions: Answer each question based on your understanding of the kinetic molecular
model of gas behavior. Use full sentences for answers 1, 2, and 5.
1. A balloon from an air-conditioned room is left in a hot car parked in the sun for
several hours. Will the balloon’s volume become larger, shrink, or stay the same?
2. Using your understanding of the kinetic molecular model of gas behavior, explain
your reasoning for answer #1:
3. Draw the difference between the molecules in a balloon on a hot day, a mild day,
and a very cold day. Represent the molecules using a small circle and a comet tail
(long tail = faster, short tail = slower)
4. Which of the images below is a correct representation of what happens to the
overall position of gas molecules in a fixed wall (non expanding) container when it
is cooled?
Initial temperature
a
5. Explain your reasoning for answer #4:
b
c
d
Chemistry: Kinetic Molecular Theory
Name:____________________
Per:____
KEY
Directions: Answer each question based on your understanding of the kinetic molecular
model of gas behavior. Use full sentences for answers 1, 2, and 5.
1. A balloon from an air-conditioned room is left in a hot car parked in the sun for
several hours. Will the balloon’s volume become greater, smaller, or stay the same?
The balloon’s volume will become greater.
2. Using your understanding of the kinetic molecular model of gas behavior, explain
your reasoning for answer #1:
As the temperature increases, the kinetic energy of the gas molecules will increase,
causing them to strike the walls of the balloon more frequently, and with greater
force.
3. Draw the difference between the molecules in a balloon on a hot day, a mild day,
and a very cold day. Represent the molecules using a small circle and a comet tail
(long tail = faster, short tail = slower)
4. Which of the images below is a correct representation of what happens to the
overall position of gas molecules in a fixed wall (non expanding) container when it
is cooled?
Initial temperature
a
b
c
d
5. Explain your reasoning for answer #4:
A physical property of gas is to fill a container completely. The temperature will
have no effect on the random position and movement of gas molecules.