Effect of Variables
Rank It!
Particle Perspective
Solve It!
Gases Around You
100
A sealed syringe is compressed to half its original volume. How is the internal pressure affected?
It increases.
100
Rank these pressures from greatest to least: 3 atm, 760mm Hg, 202.65 kPa
760mm Hg, 202.65 kPa, 3 atm
100
Heating a gas increases pressure because particles move ____.
Faster
100
A gas occupies 6.0 L at 3.0 atm. What volume will it occupy at 1.5 atm?
12 L
100
When you draw back a syringe, how is internal pressure affected?
It decreases
200
A rigid container of gas is cooled while the volume remains constant. How does the pressure change?
It decreases.
200
Rank the tanks in order of decreasing pressure.
B, C, A
200
A balloon shrinks after being placed in a freezer.
Which explanation is best?
A.) The particles become heavier
B.) The particles become smaller
C.) The particles slow down
D.) The particles speed up
C.) The particles slow down
200
A gas occupies 2.0 L at 1.0 atm and 273 K. What volume will it occupy at 2.0 atm and 546 K?
2.0 L
200
A sealed spray paint can is left in a heated car. Why is this dangerous?
Temperature is high, pressure increases, potential explosion
300
A balloon is heated from 300 K to 600 K at constant pressure. How is volume affected?
It doubles.
300
Rank from most ideal to least ideal behavior:
A.) Moderate temperature, moderate pressure
B.) Low temperature, high pressure
C.) High temperature, low pressure
C, A, B
300
Why does compressing a gas increase pressure on the container walls?
Particles collide more often with less available free room
300
How much faster does hydrogen escape through a porous container than sulfur dioxide?
Hydrogen gas effuses 5.64 times as fast as SO2 gas does.
300
A balloon is left outside on a cold winter day and appears smaller than it did indoors. Why?
The lower temperature causes the gas particles to move more slowly, so the balloon's volume decreases.
400
The contained gas is cooled while the atmosphere remains unchanged. What is affected, and how?
The difference in height (h) decreases because gas pressure decreases
400
Rank each container in order of increasing pressure.
A, B, D, C
400
Two containers have the same temperature. One contains ammonia (NH3) and one contains oxygen. Which particles move faster?
Ammonia particles
400
A mixture contains 2.05 moles of H2, 1.89 moles of CO2, and 3.62 moles of F2. If the total pressure of the mixture is 12.3 atm, what is the sum of the partial pressures of H2 and F2?
9.23 atm
400
Why does a sealed bag of chips appear puffier at the top of a mountain than at sea level?
The lower atmospheric pressure outside allows the gas inside the bag to expand.
500
A container of N2 gas has a volume of 37 L and a temperature of 298 K. If both the volume and temperature are doubled, how is the pressure affected?
The pressure remains the same.
500
At the same temperature, rank the average speed of these gases from fastest to slowest: SO2, CO, F2
CO, F2, SO2
500
"When a gas is compressed, the pressure increases because the particles collide harder."
What is wrong with this explanation?
Pressure increases because of more frequent collisions, not necessarily because each collision has more force.
500
If 6.20 L of sulfur dioxide gas are collected at 3.426 atm and 12.9oC according to the reaction shown below, how many grams of iron (III) oxide will also be produced?
4 FeS(s) + 7O2(g) → 2 Fe2O3(s) + 4 SO2(g)
72.4 g iron (III) oxide
500
Many people think a vacuum cleaner "sucks" dirt in. What actually causes the dirt to move into the vacuum?
The vacuum creates a lower-pressure region inside the cleaner. Higher atmospheric pressure pushes air and dirt into the vacuum.