Name
Date
Class
Gas Behavior
You take a sealed, air-filled balloon, squeeze it and then release it. Next you take the
balloon and place it in a refrigerator for half an hour, then remove it. In each case, explain
the changes in volume, pressure, and temperature.
61D
Name
Date
Class
Gas Behavior
Understanding Main Ideas
If the statement is true, write true. If the statement is false, change the underlined word
or words to make the statement true.
1.
If the temperature of a gas is constant, when the pressure is
increased, the volume decreases.
2.
If the air pressure inside an inner tube is constant, when the
temperature of the air is increased, the volume decreases.
3.
The graph of the relationship between the volume of a gas at
constant temperature and its pressure is a(n) line.
4.
If the temperature of a gas inside a sealed, rigid container is
decreased, its pressure decreases.
5.
The graph for Charles’s law shows that the volume of a gas at
constant pressure is inversely proportional to its temperature.
6.
If a gas at constant pressure inside a cylinder topped by a
movable piston is heated, the volume of the gas will increase and push the piston
outward.
Building Vocabulary
Fill in the blank to complete each statement.
7. When the graph relating two variables is a straight line passing though the origin,
the variables are
proportional.
8. According to
law, when the pressure of a gas at constant
temperature is increased, the volume of the gas decreases.
9. According to
law, when the temperature of a gas is increased
at constant pressure, its volume increases.
10. When the product of two variables is constant, the variables are
proportional to each other.
61E
Name
Date
Class
Gas Behavior
Read the passage and study the graphs below it. Then use a separate sheet of paper to
answer the questions that follow the graphs.
Grasping Gas Graphs
You have examined the relationship between the temperature and volume of a gas, and between the
pressure and volume of a gas. Suppose a scientist wants to determine whether the number of particles
of a gas is related to its pressure. Data for this experiment can be collected by increasing the number of
gas particles in a container with a constant volume and temperature, and measuring the pressure of the
gas. The number of gas particles can be increased by pumping more gas into the container. Sample data
from such an experiment are shown by the solid line in Figure 1. The dotted line shows how the resulting
graph can be extended.
The relationship between the number of particles of a gas and its volume at a constant temperature can
be determined in a similar way. Data for this experiment can be collected by increasing the number of
gas particles in a cylinder that has a movable piston and measuring the effect on the volume. The graph
in Figure 2 shows sample data from such an experiment.
1. What is the manipulated variable in each graph? What is the
responding variable?
2. What is the relationship between the number of gas particles and
pressure? Are these two variables directly proportional or do they
vary inversely?
3. What is the relationship between the number of gas particles and
volume? Are these two variables directly proportional or do they vary
inversely?
4. When the number of gas particles in a container with constant
volume decreases, how will the pressure of the gas change?
5. When the number of gas particles at constant pressure increases,
how will the volume of the gas change?
61F
Name
Date
Class
Gas Behavior
Write the letter of the correct answer on the line at the left.
1.
At constant temperature, when
the volume of a gas is decreased, what
happens to its pressure?
A It decreases.
B It will vary.
C It increases.
D It remains constant.
2.
At constant pressure, when the
temperature of a gas is decreased, what
happens to its volume?
A It decreases.
B It will vary.
C It increases.
D It remains constant.
3.
At constant pressure, how are the
temperature and volume of a gas related?
A They are inversely proportional.
B They are directly proportional.
C They are constant.
D They are indirectly proportional.
4.
If the sun shining through windows
heats the air in a sealed room, what
happens to the air pressure in that room?
A It decreases.
B It will vary.
C It increases.
D It remains constant.
Fill in the blank to complete each statement.
5. When Martin pushes down on the handle of his bicycle pump, the air pressure within
the pump
.
6.
law describes the relationship between a gas’s volume and
pressure when its temperature is constant.
7.
law describes the relationship between a gas’s temperature and
volume when its pressure is constant.
8. At constant temperature, the pressure and volume of a gas are
proportional.
9. At constant volume, when the temperature of a gas decreases, the
pressure
.
10. When the graph relating two variables is a straight line passing through the origin,
the variables are
proportional to each other.