Additional Exercises

1. What is the final volume of a gas whose initial conditions are 3.21 L and 0.980 atm and a final pressure of 1.12 atm?
2. What is the final pressure of a gas whose initial conditions are 34.6 L and 0.870 atm and a final volume of 22.3 L?
3. What is the final temperature of a gas whose initial conditions are 0.667 L, 1.08 atm, and 27°C and whose final volume and pressure are 1.334 L and 1.58 atm, respectively?
4. What is the final volume of a gas whose initial conditions are 1.21 L, 1.08 atm, and 294 K and whose final temperature and pressure are 306 K and 1.58 atm, respectively?
5. At an altitude of 40 km above the earth’s surface, the atmospheric pressure is 0.00658 atm, and the surrounding temperature is 253 K. If a weather balloon is filled with 1.000 mol of He at 1 atm and 295 K, what is its: (R = 0.0821 atm L/mol K)
1. initial volume before ascent? (R = 0.0821 atm L/mol K)
2. final volume when it reaches 40 km in altitude? (Assume the pressure of the gas equals the surrounding pressure.)
6. If a balloon is filled with 1.000 mol of He at 760 torr and 22°C, what is its: (R = 0.0821 atm L/mol K and 1 atm = 760 torr)
1. initial volume before ascent?
2. final volume if it descends to the bottom of the Mariana Trench, where the surrounding temperature is 1.4°C and the pressure is 1,060 atm?
7. Determine if the following actions will cause the pressure of a particular gas sample to increase, decrease, or remain the same:
1. decreasing the temperature
2. increasing the number of moles of gas in the container
3. decreasing the volume of the container
8. Under what conditions do gases deviate most from ideal gas behavior? Explain your answer.

Answers

1. 2.81 L

3. 907 K

5. a. 24.2 L

5 b. 3160 L

7 a. decreased pressure

7 b. increased pressure

7 c. increased pressure

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Chem&121: Introduction to Chemistry Copyright © 2023 by Lake Washington Institute of Technology is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, except where otherwise noted.