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Gas Laws
Related Topics
Wize University Chemistry Textbook > Gases and their Properties
Kinetic Energy, Temperature, and Speed of Gas Particles
6 Activities
Wize University Chemistry Textbook > Gases and their Properties
Real vs Ideal Gases
5 Activities
Choose the correct statement(s):
The deviations from ideal gas behaviour is least significant at low pressure and high temperature.
A gas will behave as an ideal gas when the distances between gas molecules are small compared with the sizes of the molecules themselves.
In the Van der Waals equation, the constant "b" is associated with intermolecular interactions.
The average speed of molecules in an ideal gas is directly proportional to the kelvin temperature.
Hydrogen gas (2.0 g mol
−1
) effuses twice as fast as helium gas (4.0 g mol
−1
) at the same temperature and pressure.
I don't know
Check Submission
More Kinetic Energy, Temperature, and Speed of Gas Particles Questions:
Molecular Theory of Gases: Kinetic Energy
Which of the following have the same kinetic energy?
He at 297 K He at 351 K H
2
at 297 K O
2
at 212 K SO
2
at 297 K
Collision theory: Root Mean Square Speed
Which of the following would have the lowest root mean square speed?
a) NO
2
at 273 K b) NO
2
at 453 K c) O
2
at 273 K
Consider the following two curves showing distributions of number of molecules vs. their kinetic energies for two different gas samples. Which of the following statements is
not consistent
with the two curves?
If the temperature of a sample of an unknown gas is increased from 0 °C to 100 °C, what will be the new root mean square speed of the particles if the original value was 330 m/s?
If a mixture of He and Xe are present in a vessel, and the root mean square speed of He is 412 m/s, what is the root mean square speed of Xe? What is the temperature of this vessel?
Kinetic Molecular Theory
1. Compare the average kinetic energies of SiH
4
and CH
4
at a specific temperature?
2. Place these gases in order of increasing average molecular speed at 25
°
C: Kr, CH
4
, N
2
, CH
2
Cl
2
.
Kinetic Molecular Theory
Calculate the ratio of the rms speed of N
2
molecules 100
⁰
C to the rms speed of the same at 0
⁰
C.
Graham's Law: Kinetic Energy
1. If a mixture of He and Xe are present in a vessel, and the root mean square speed of He is 412 m/s, what is the root mean square speed of Xe? What is the temperature of this vessel?
Kinetic Energy and Temperature
3. If the temperature of a sample of an unknown gas is increased from 0 °C to 100 °C, what will be the new root mean square speed of the particles if the original value was 330 m/s?
How does the root mean square speed of a gas vary with molar mass?
Which of the following have the same kinetic energy?
I He at 297 K
II He at 351 K
Collision theory: Root Mean Square Speed
Which of the following would have the lowest rms?
a) NO
2
at 273 K b) NO
2
at 453 K c) O
2
at 273 K
Molecular Theory of Gases: Kinetic Energy
Which of the following have the same kinetic energy?
He at 297 K He at 351 K H
2
at 297 K O
2
at 212 K SO
2
at 297 K
Molecular theory of gases: Kinetic energy
Which one of the following gases has the greatest average molecular velocity at 300 K?
Atom: Wave-Particle
An proton is confined in a 1-D box with a length of 40 pm.
What is the wavelength of the proton when n = 3?
Atom: Kinetic Energy
An proton is confined in a 1-D box with a length of 40 pm.
What is the kinetic energy of the proton when n = 3?
Atom: Kinetic Energy
A proton is confined in a 1-D box with a length of 40 pm.
Would moving to a larger box result in higher or lower energy?
Kinetic Molecular Theory
Suppose you have a sample of gas at a fixed temperature, and you increase the volume of the container. The pressure changes, since there are...
Gas Laws
Suppose you have a sample of gas at a fixed temperature, and you increase the volume of the container. The pressure changes, since there are...
Kinetic Molecular Theory
Which statement is false?
Consider the following two curves showing distributions of number of molecules vs. their kinetic energies for two different gas samples. Which of the following statements is
not consistent
with the two curves?
The following curves show the distribution of molecules vs. speed for two different samples of gas, System 1 and System 2. The area under both curves is equal. Which of these descriptions is
not consistent
with the differences between these two graphs?
More Real vs Ideal Gases Questions:
A real gas has a lower pressure than an ideal gas at low temperatures because:
Real vs Ideal Gases
Answer the following question using the table of van der Waals parameters below.
Which of the above gases takes up more of the ideal volume inside a flask
Gas Laws
How do real gases differ from ideal gases?
At a temperature of 320 K and a pressure of 16 atm, the molar volume of ammonia (NH
3
) is about 10% less than that of an ideal gas under those conditions. The best explanation for this observation is?
The graph at the right shows PV/RT as a function of pressure for one mole of an ideal gas (horizontal dashed line) and for several real gases. One notices that for most of the real gases PV/RT is smaller than predicted by the ideal gas law for lower pressures. The reason for this deviation from ideal behavior is:
Ideal Gas Laws
At very high pressures, gas properties deviate from those predicted by the ideal gas law. The actual volume of the gas will be…
Gases behave most ideally at
low
pressure and
high
temperature