Gases and the Absolute Scale of Temperature Quiz
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5 questions, one answer each
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1. What is meant by absolute zero?
- A. A. The temperature at which water freezes
- B. B. The lowest possible temperature, where particles have least kinetic energy
- C. C. A temperature of 0 degrees Celsius
- D. D. The temperature at which gases become liquid
2. Convert 15 degrees Celsius to kelvin.
- A. A. 258 K
- B. B. 273 K
- C. C. 288 K
- D. D. 15 K
3. Why does a gas exert pressure on the walls of its container?
- A. A. Because gas particles are attracted to the container walls
- B. B. Because gas particles collide with the walls, exerting a force per unit area
- C. C. Because gas has weight that presses on the walls
- D. D. Because the container expands under heat
4. A fixed mass of gas is heated while its volume is kept constant. What happens to its pressure, and why?
- A. A. Pressure decreases, as particles slow down
- B. B. Pressure stays the same, as volume is unchanged
- C. C. Pressure increases, as particles move faster and collide more often and harder
- D. D. Pressure increases only if the gas is a noble gas
5. A fixed mass of gas at constant temperature has a pressure of 150 kPa in a volume of 8 m3. What is its pressure when compressed to 3 m3?
- A. A. 56.25 kPa
- B. B. 150 kPa
- C. C. 300 kPa
- D. D. 400 kPa