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- 1. Multiple Choice
A student inflates a balloon with helium then places it in the freezer. The student should expect
the balloon's volume to increase
the balloon's volume to decrease
the balloon's moles to increase
the balloon's moles to decrease
- 2. Multiple Choice
Three gases are mixed together in a container with a total pressure of 4.8 atm. If two of the gases have pressures of 1.2 atm and 1.5 atm, what is the pressure of the third gas?
2.5 atm
1.8 atm
2.1 atm
1.3 atm
- 3. Multiple Choice
If a hairspray can is heated, what can be expected of the pressure of the gas inside the can?
The pressure will increase
The pressure will decrease
The pressure will remain constant
The pressure will equalize
- 4. Multiple ChoiceWhich of the following would increase the (gas) pressure of a system?Increase the TemperaturePump in more gasDecrease the volumeAll of these
- 5. Multiple ChoiceIn order to convert to Kelvin, you add ______ to the Celsius measurement.372273237732
- 6. Multiple ChoiceWhat is 50 °C in Kelvin?22332310050
- 7. Multiple ChoiceCalculate the volume that a 0.323-mol sample of a gas will occupy at 265 K and a pressure of 0.900 atm.7.18 L7.81 L4.63 L4.36 L
- 8. Multiple Choice
Find the volume occupied by 22.0 g of helium gas at 25.0 o C and 1.18 atm .
123 L
9.57 L
114 L
159 L
- 9. Multiple Choice
Unit inter-conversions allow different scales for measuring temperature, pressure or volume to be compared.
Which sets of pressures are equivalent ?
1.6 kPa, 1260 torr, 1.42 atm
6.9 kPa, 912 torr, 1.50 atm
1.6 kPa, 912 torr, 1.20 atm
0 kPa, 1000 torr, 1.40 atm
- 10. Multiple Choice
A real gas does not exhibit ideal gas behaviour because
there are significant attractions between molecules so that the volume of the gas is reduced
the size of the particles are inconsequential and so their volume can be ignored in calculations
the collisions between the gas particles are perfectly elastic and so no energy is gained or lost
only noble gases are ideal gases and all other gases are called real gases
- 11. Multiple Choice
Out of the following which of the three real gases would you expect to act most like an ideal gas ?
Ammonia
Hydrogen
Nitrogen
All of the gases would act like ideal gases
- 12. Multiple Choice
A gas sample has an initial volume of 55.2 mL, an initial temperature of 35.0 o C and an initial pressure of 735 mm Hg. The volume is decreased to 48.8 mL and the temperature is increased to 72.5 o C . What is the final pressure ?
933 mm Hg
186 mm Hg
1.72 x 103 mmHg
84.0 g Kr
- 13. Multiple Choice
Which of the following term does not involve an ideal gas law ?
Pressure
Volume
Temperature
Time
- 14. Multiple Choice
A 0.0900 L syringe has a volume of :
0.0900 mL
9.0 mL
90 mL
900 mL
- 15. Multiple Choice
The combined gas law allows us to determine relationships between temperature, pressure and the volume of gases, including those used in a gas balloon. What is the final pressure if 155.0 mL of a gas at 22.0 o C and 374 mmHg is cooled to 0.00 o C and has a final volume of 102.0 mL
526 mm Hg
614 mmHg
73.4 mmHg
39.1 mmHg
- 16. Multiple Choice
Grahams law of effusion explains why some molecules have a higher velocity rate than others. Out of the following substances which gas will have the highest velocity ?
Ammonia
Hydrogen
Chlorine
Nitrogen
- 17. Multiple Choice
Which of the following graphs represents pressure versus volume (V) for a real gas at a constant temperature
A
B
C
D
- 18. Multiple Choice
This graph represents which gas law ?
Grahams law
Avogadros law
Boyles Law
Charles Law
- 19. Multiple Choice
Which of the following is a pair of equivalent values ?
-298 K and O o C
298 K ans -273 o C
319 K and 46 o C
319 K and 592 o C
- 20. Multiple Choice
Diffusion and effusion are very similar. what answer best describes the process of effusion ?
movement of particles from Low concentration to high concentration
Movement of gas molecules based on their molar mass
Spreading of gas molecules that become evenly distributed
Passing of molecules through a small opening
- Answer choicesTagsAnswer choicesTags