WorksheetsSY1819 Gases 1
Total questions: 20
Worksheet time: 24mins
A hypothetical gas that perfectly fits all the assumptions of the kinetic molecular theory is a(n)________
ideal gas
combined gas
technical gas
chemical gas
According to the kinetic molecular theory there are only slight forces of attraction between gas particles.
True
False
The kinetic molecular theory says that gases consist of large numbers of tiny particles that are very close together.
True
False
According to the kinetic molecular theory collisions between gas particles are perfectly elastic.
True
False
Grahams law of effusion states that the rate of effusion of gases at the same temperature and pressure are _______.
directly proportional to the mass
inversely proportional to the molar mass
inversely proportional to the square root of the molar mass
directly proportional to the square root of the molar mass
Why would O2 effuse faster than CO2 if they are at the same conditions?
because O2 has more kinetic energy
because O2 has a smaller molar mass
because O2 has a higher temperature
they will effuse the same because the temperature is fixed
Effusion is
used to describe the combustibility of a gas.
the ability of a gas to escape through a tiny opening
what occurs after diffusion.
the ability of a gas to mix with other gases.
How are diffusion and effusion similar?
Both describe particles moving from an area of high concentration to low concentration
Both describe the movement of particles through a tiny whole
They are different words for the same thing
Both describe particles moving from areas of low concentration to areas of high concentration
Use Graham’s Law to calculate how fast O2 gas will effuse compared to Cl2.
O2 effuses 1.5x faster than Cl2
O2 effuses 0.11x as fast as Cl2
O2 effuses 1.1x faster than Cl2
O2 effuses 0.15x as fast as Cl2
It takes 243 s for 4.46 × 10-5 mol Xe to effuse through a tiny hole. Under the same conditions, how long will it take 4.46 × 10–5 mol Ne to effuse?
37.3 s
95.3 s
620. s
1580 s
Don't forget to check for diatomics!
what is the rate of effusion for NH3 (M=17) if the rate of effusion for SO2 (M=64) is 0.800m/s
1.55 m/s
2.00 m/s
0.500m/s
0.800m/s
Convert 540 mmHg to kPa; round your answer to correct sig figs.
71.976 kPa
72 kPa
4051 kPa
4100 kPa
Convert 760 atm to mmHg; round your answer to correct sig figs
577600 mmHg
1.0 mmHg
580000 mmHg
5.7 x 105 mmHg
A device used to measure atmospheric pressure.
Barometer
Manometer
A mixture of hydrogen, nitrogen, and water vapor has a total pressure of 864 mmHg. The partial pressure of hydrogen is 220. mmHg and that of nitrogen is 410. mmHg. What is the partial pressure of water vapor?
234 mmHg
1.37 mmHg
2.64 mmHg
1, 494 mmHg
Three gases, argon, nitrogen and hydrogen are mixed in a 500.0L container. Argon has a pressure of 255 Torr, nitrogen has a pressure of 228 Torr and hydrogen has pressure of 752 Torr. What is the total pressure in the container?
483 Torr
270. Torr
1240 Torr
A vessel with a volume of 26.9 L contains 28.0 g of nitrogen gas, 0.605 g of hydrogen gas, and 79.9 g of argon gas. At 25 ⁰C, what is the mole fraction of nitrogen?
0.303
0.606
0.258
0.999
