Average Kinetic Energy
Average kinetic energy per molecule of ideal gas is:
Select the correct option:
🔒 Solution Hidden from View
Submit your answer to unlock the detailed step-by-step solution.
More kinetic theory of gases Practice Questions
How does the mean free path of molecules in a gas sample change if the number density of molecules i...
How does the mean free path of molecules in a gas sample change if the number density of molecules i...
A weather balloon contains 2 moles of an ideal gas, so approximately how many gas molecules are pres...
A weather balloon contains 2 moles of an ideal gas, so approximately how many gas molecules are pres...
As the temperature of a gas sample is increased, how does the shape of its Maxwell molecular speed d...
As the temperature of a gas sample is increased, how does the shape of its Maxwell molecular speed d...
A rigid insulated tank contains a mixture of 2 moles of a monatomic gas and 2 moles of a diatomic ga...
A rigid insulated tank contains a mixture of 2 moles of a monatomic gas and 2 moles of a diatomic ga...
Equal volumes of two different ideal gases are compared at the same temperature and pressure, so wha...
Equal volumes of two different ideal gases are compared at the same temperature and pressure, so wha...
Which of the following assumptions is fundamental to the kinetic theory model of an ideal gas as des...
Which of the following assumptions is fundamental to the kinetic theory model of an ideal gas as des...
In a laboratory vacuum chamber the pressure of a gas is reduced to one-tenth of its initial value wh...
In a laboratory vacuum chamber the pressure of a gas is reduced to one-tenth of its initial value wh...
A rigid diatomic gas molecule at ordinary room temperature, ignoring vibrational modes, possesses ho...
A rigid diatomic gas molecule at ordinary room temperature, ignoring vibrational modes, possesses ho...
When the absolute temperature of a fixed sample of ideal gas is raised from 300 K to 600 K, by what ...
When the absolute temperature of a fixed sample of ideal gas is raised from 300 K to 600 K, by what ...
Consider a tank of nitrogen molecules each of molar mass 28 grams per mole maintained at 300 K, so w...
Consider a tank of nitrogen molecules each of molar mass 28 grams per mole maintained at 300 K, so w...
For a sample of ideal gas at a given temperature, arrange the most probable speed, the average speed...
For a sample of ideal gas at a given temperature, arrange the most probable speed, the average speed...
Two containers hold helium and oxygen respectively at the same absolute temperature, so how do the a...
Two containers hold helium and oxygen respectively at the same absolute temperature, so how do the a...
About This Question
- Subject
- physics
- Chapter
- kinetic theory of gases
- Topic
- average kinetic energy
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
(3/2) k T
The kinetic theory relates the macroscopic temperature (T) to the microscopic average translational kinetic energy (Kˉ) of molecules: Kˉ=21mvˉ2=23kBT where:
- kB is the Boltzmann constant (≈1.38×10−23 J/K).
- This result comes from the pressure equation P=31VNmvˉ2 and the ideal gas law PV=NkBT.
- This energy depends only on temperature, not on the pressure, volume, or type of the ideal gas.
This easy difficulty physics question is from the chapter kinetic theory of gases, covering the topic of average kinetic energy. It appeared in the 2025 exam.
Looking for more practice? Explore all physics questions or browse kinetic theory of gases questions on RankGuru.