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Review gas laws

dluitiple ChoiceIdentify the choice that best completes the statement or answers the question.

1. All of the following relationships are false for gases EXCEPTa. volume is inversely proportional to the moles of gas.b. volume is directly proportional to pressure in mm Hg.c. volume is directly proportional to pressure in atmospheres.

(2) volume is directly proportional to temperature in Kelvin.e. volume is directly proportional to the gas constant R.

2. A bicycle tire is filled to a pressure of 4.42 atm (65 psi) at a temperature of 12°C. If the temperature of thetire increases to 33°C, what is the pressure in the tire? Assume the volume of the tire is constant.

A-' 4.75 atmy. 5.91 atm

c. 9.28 atmd. 12.1 atme. 16.1 atm

3. A 10.0 L flask contains 14.1 grams of an unknown gas. If the pressure in the flask is 2.3 atm at 65°C, whichof the following is a possible identity of the gas?

I/":} NH3~ CO

c. O2d. CO2

e. CS2

4. A mass of 5.0 grams of dry ice, CO2(s), is sealed in an evacuated 2.0 L plastic soda bottle. What is thepressure inside the bottle when the CO2 is heated to 35°C?

.A 0.16 atm(V 1.4 atm

c. 8.9 atmd. 18atme. 63 atm

5. 25.0 L of hydrogen gas at 50.0 atm and 25°C expands to 65.0 L and is subsequently heated to 35°C. What is

~

new pressure?a. 19.9 atm. 25.2 atm

c. 26.9 atmd. 28.4 atme. 31.2 atm

6. A gas is confined in a steel tank with a volume of 6.982 L. At 20.20°C, the gas exerts a pressure of 8.532atm. After heating the tank, the pressure of the gas increases to 10.406 atm. What is the temperature of theheated gas?a. -32.60°Cb. 24.63°C

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7. According to Gay-Lussac's law:a. pressure is inversely proportional to volume at constant temperature.

pressure is directly proportional to temperature at constant volume.c. volume is inversely proportional to temperature at constant pressure.d. volume is directly proportional to temperature at constant pressure.

8. How many moles of steam are produced at 2.00 atm and 202.0°C by the complete combustion of 12.50 L ofmethane gas?a. 0.001 molb. 0.012 mol

c. 0.640 mol(!) 1.28 mol

9. Four liters of gas at atmospheric pressure is compressed into a 0.85 L gas cylinder. What is the pressure ofthe compressed gas if its temperature remains constant?a. 0.15 atm c. 3.4 atmb. 0.21 atm ~ 4.7 atm

10. When a bicycle reaches the top of a hill with a tire volume of 0.80 L, the atmospheric pressure is 9.0 atm.What is the maximum volume of air that can be filled in the tire just before it bursts?

ral 0.088 L c. 8.9 LY. 1.2 L d. 11 L

11. A balloon is filled with 3.50 L of water at 24.0°C and 2.27 atm. If the balloon is placed outdoors on a hot dayat a temperature of34.0°C, what is the volume of the balloon at constant pressure?a. 2.47 L Itl 3.61 Lb. 3.38 L d. 8.19 L

12. How does the gas propellant move when an aerosol can is used?raJ from a region of high pressure to a region of lower pressure"If. from a region of high pressure to a region of equally high pressurec. from a region of low pressure to a region of higher pressured. from a region of low pressure to a region of equally low pressure

13. );4:he volume of a container of gas is reduced, what will happen to the pressure inside the container?c.v The pressure will increase.b. The pressure will not change.c. The pressure will decrease.d. The pressure depends on the type of gas.

14. As the temperature of the gas in a balloon decreases, which of the following occurs?a. The volume of the balloon increases.

Ifj'), The average kinetic energy of the gas decreases.'¥. The gas pressure inside the balloon increases.

d. all of the above15. Which of these changes would NOT cause an increase in the pressure of a contained gas?

~ The volume of the container is increased.Y. More of the gas is added to the container.c. The temperature is increased.d. The average kinetic energy of the gas in increased.

16. ~e volume of a gas is doubled while the temperature is held constant. How does the gas pressure change?. It is reduced by one half.. It does not change.

c. It is doubled.d. It varies depending on the type of gas.

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17. If a balloon is heated, what happens to the volume of the air in the balloon if the pressure is constant?~ It increases. c. It decreases.~ It stays the same. d. The change cannot be predicted.

18. A.a sealed syringe is plunged into cold water, in which direction will the syringe piston slide?W in c. No movement will occur.b. out d. The direction cannot be predicted.

TruelFalseIndicate whether the statement is true or false.

-E 19. A weather balloon functions on the principle of Gay-Lussac's law.

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