Review for Gases

  1. If 4.00 L of a gas at 1.04 atm is changed to 745 torr at constant temperature, what is its final volume?

Ans: 4.24L

  1. If 2.00 L of a gas at 0oC is changed to 1575 ml at constant pressure, what is its final temperature?

Ans: 215 K

  1. A sample of gas occupies 3.44L. What will be its new volume if its pressure is doubled at constant temperature?

Ans: 1.72 L

  1. If 4.00 L of a gas at 33o C is changed to 66o C at constant pressure, what is its final volume?

Ans: 4.43 L

5. What is the total pressure of a gas mixture containing He at 0.25 atm, Ne at 0.55 atm and Ar at 0.30 atm? Ans: 1.10 atm

P1 / V1 / T1 / P2 / V2 / T2 / Ans
1. / 1.00 atm / 1.00 L / 273 K / 2.00 atm / 2.00 L / 1090 K
2. / 7.00 atm / 300 K / 3.30 atm / 6.00 L / 400 K / 2.12 L
541 torr
68.8 K
3. / 2.91 L / 45ºC / 780 torr / 2.22 L / 77ºC
4. / 721 torr / 200 mL / 1.21 atm / 0.850 L / 100ºC

7. A diver at the depth of 100 ft (pressure is approximately 3 atm) exhales a small bubble of air with a volume equal to 100 mL. What will the volume of bubble be at the surface?

`Ans: 300 mL

8. A weather balloon is filled with 0.295 m3 of He on the groundat 18 C and 756 torr. What will the volume be at an altitude of 10 km where the temperature is -48ºC and the pressure is 0.14 atm? Ans: 1.6m3

9. A sample tube containing 103.6 mL of CO gas at 20.6 torr is connected to an evacuated 1.13 L flask. What will be the pressure when CO is allowed in the flask?

Ans: 1.89 torr

10. What instruments are used to measure atmospheric pressure and gas pressure? How do they work?

11. What are the main points of KMT? Under what condition of pressure and is a gas most likely to obey gas laws?

9/23/2018