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Gas Laws

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Wize University Chemistry Textbook > Gases and their Properties

Gas Laws

4 Activities

Wize University Chemistry Textbook > Gases and their Properties

Kinetic Energy, Temperature, and Speed of Gas Particles

6 Activities

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...

More Gas Laws Questions:
Gases
In the gas apparatus below, the pressure of the gas in the 5.0 L bulb is 1 atm and the pressure of the gas in the 2.0 L bulb is 3.0 atm. What is the pressure in the bulbs once the valve is opened, assuming the temperature is held constant.
Gases
In the gas apparatus below, the pressure of the gas in the 5.0 L bulb is 1 atm and the pressure of the gas in the 2.0 L bulb is 3.0 atm. What is the pressure in the bulbs once the valve is opened, assuming the temperature is held constant.
Gas Laws: Kinetic energy
Which of the following relationships is/are CORRECT for gases?
Ideal Gas Laws: Molar volume
Answer the following two questions based on the Ideal Gas Law:
Ideal Gas Law
Which of the following changes will NOT affect the total pressure of gas in a container, assuming all other factors remain constant?
Gas Mixtures: Partial pressures
Consider the gas-phase reaction shown in this balanced chemical equation:
2A(g)+B2(g)→2AB(g)2A(g)+B_2(g)→2AB (g)
A rigid flask is filled with gases so that the initial partial pressure of A is 1.0 atm and the intial partial pressure of B is 0.50 atm. If the reaction goes to completion and the temperature stays constant, what is the final pressure in the flask?
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…
Gas Laws
Which of the following relationships is/are CORRECT for gases?
The amount of a gas (in moles) is inversely proportional to its volume (at constant temperature and pressure).
The volume of a gas is directly proportional to its temperature in kelvin (at constant pressure and moles).
2 moles of hydrogen gas are held in a sealed steel vessel so that the Volume is held constant. The temperature is doubled, what is the effect on the pressure?
What is the volume of 2.5 mols of Ne at 298 K and 1.0 atm? What is the new volume after 4.5 mols of Ne are added?
A sample of a gaseous compound is distributed into two vessels, A and B, of equal volume held at the same temperature and pressure. Vessel A is heated to twice its initial temperature in Kelvin, followed by compression to one quarter of its initial volume. Vessel B is cooled to half of its initial temperature in K, followed by expansion to twice it’s original volume. What is the ratio of the pressure in vessel A to the pressure in vessel B after these transformations?
A 15 L sample of N2 gas held at 328 K is compressed such that the pressure rises from 1.0 atm to 7.8 atm. What is the final volume of the gas?
Whose law states that at constant temperature for a fixed amount of gas, the volume is inversely proportional to the pressure?
Who is the scientist who related the volume of gas to the number of particles contained in the gas, regardless of which gas it is?
Gas Law: Volume
If the pressure inside a container is kept constant and the container is heated, what would happen to the volume of the gas?
Gases (Ideal)
A tank of gas has a pressure of 10 atm at 25oC. At what temperature (in degrees Celcius) will it reach a pressure of 20 atm?
Gas Laws: Pressure as a function of temperature
An ideal gas is heated in a sealed container from 45 °C to 100 °C. If the original pressure in the vessel was 0.50 atm, what is the pressure after heating in kPa?
Gas Laws
A 15 L sample of N2 gas held at 328 K is compressed such that the pressure rises from 1.0 atm to 7.8 atm. What is the final volume of the gas?
If there are 0.33 moles each of hydrogen (H2), argon (Ar), and methane (CH4) at the same temperature and pressure then which statement is CORRECT?
To increase the volume of a fixed amount of gas from 100 mL to 200 mL
A 15 L sample of N2 gas held at 328 K is compressed such that the pressure rises from 1.0 atm to 7.8 atm. What is the final volume of the gas?
For an ideal gas which variables in the following pairs are not directly proportional to each other (if all other factors remain constant)?
Which of the following graphs is NOT consistent with the ideal gas law assuming that the other parameters are kept constant?
Ideal Gas Law: Practice
A small tank of compressed oxygen gas is left outside in the sun and its temperature increases. Assume that the amount of gas and the volume of the tank do not change.
Identify which of the four graphs below show how…
A. …the pressure (P) of the gas inside the tank changes as T increases.
Ideal Gas Law: Mixtures of Gases
You have a rigid container filled with a mixture of three gases: nitrogen, oxygen, and carbon dioxide. Your task is to compare two different methods to remove all of the carbon dioxide from the container.
Method A: Adding a solid material which adsorbs CO2 gas – this means that CO2 molecules stick to this material so that all of the CO2 will be removed when the solid is removed.
Method B: Adding an excess of solid sodium peroxide (Na2O2) to convert all of the CO2 gas to oxygen gas.
Gas laws
A 15 L sample of N2 gas held at 328 K is compressed such that the pressure rises from 1.0 atm to 7.8 atm. What is the final volume of the gas?
Gas Laws: Pressure
4. A sample of a gaseous compound is distributed into two vessels, A and B, of equal volume held at the same temperature and pressure. Vessel A is heated to twice its initial temperature in Kelvin, followed by compression to one quarter of its initial volume. Vessel B is cooled to half of its initial temperature in K, followed by expansion to twice it’s original volume. What is the ratio of the pressure in vessel A to the pressure in vessel B after these transformations?
Ideal Gas Laws: Volume
6. What is the volume of 2.5 mols of Ne at 298 K and 1.0 atm? What is the new volume after 4.5 mols of Ne are added?
Gas Stoichiometry
A tank of gas has a pressure of 5 atm at 25oC. At what temperature (in degrees Celsius) will it reach a pressure of 8 atm?
Ideal Gas Law
12 moles of Xenon are held inside a 15L flask at room temperature.
The flask is then cooled to – 100oC.The flask is then allowed to expand into a 23L but we need to keep the pressure constant. What temperature is required to keep the pressure constant as the gas expands into the new volume.
Ideal Gas Law
12 moles of Xenon are held inside a 15L flask at room temperature.
The flask is then cooled to – 100oC what is the pressure inside the flask at -100oC?
Gases
In the gas apparatus below, the pressure of the gas in the 5.0 L bulb is 1 atm and the pressure of the gas in the 2.0 L bulb is 3.0 atm. What is the pressure in the bulbs once the valve is opened, assuming the temperature is held constant.
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 H2 at 297 K O2 at 212 K SO2 at 297 K
Collision theory: Root Mean Square Speed
Which of the following would have the lowest root mean square speed?
a) NO2 at 273 K b) NO2 at 453 K c) O2 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?
Gas Laws
Choose the correct statement(s):
Kinetic Molecular Theory
1. Compare the average kinetic energies of SiH4 and CH4 at a specific temperature?
2. Place these gases in order of increasing average molecular speed at 25 °C: Kr, CH4, N2, CH2Cl2.
Kinetic Molecular Theory
Calculate the ratio of the rms speed of N2 molecules 100 ⁰C to the rms speed of the same at 0 ⁰C.
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) NO2 at 273 K b) NO2 at 453 K c) O2 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 H2 at 297 K O2 at 212 K SO2 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...
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?