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WorksheetsKinetic therory of Gases
Total questions: 20
Worksheet time: 29mins
The pressure of an ideal gas in a vessel is p. The gas is heated at constant volume until the r.m.s. speed of the gas molecules is doubled. what is the new pressure of the gas?
√2p
2p
3p
4p
Which of the following is not an assumption of the kinetic theory of gases?
Gas molecules move with the same speed, known as the r.m.s. speed
Gas molecules are in constant free random motion
Collisions between gas molecules are perfectly elastic
The size of a gas molecule is negligible compared to the distance between gas molecules
Which of the following statements DOES NOT represent the ideal gas law ?
Pressure is directly proportional to the absolute temperature.
Pressure is inversely proportional to volume
Volume is directly proportional to the absolute temperature.
Volume is directly proportional to pressure.
The following statements are assumptions of the kinetic theory of gases EXCEPT
All gases are made up of identical atoms or molecules.
The intermolecular forces are negligible except during collisions.
The molecules undergoes inelastic collisions with one another.
The volume of the atoms or molecules is negligible when compared to the volume occupied by the gas.
Root mean squared (r.m.s) speed of a gas molecules is directly proportional to _____________ and inversely proportional to ______________.
molar mass ; temperature
temperature ; molar mass
temperature ; pressure
pressure ; temperature
One mole of any gas at Standard Temperature and Pressure (STP) occupies volume of
22.4km3
22.4cm3
22.4mm3
22.4dm3
The internal energy of an ideal gas depends on
absolute temperature
pressure
volume
degree of freedom
The degree of freedom for a diatomic molecule is
2
3
5
6
at rest
What is the average velocity of gas molecules of an ideal gas?
0
∞
mπ8KT
Can't say anything
Pressure exerted by a gas depends on:
Volume of gas chamber
Density of gas
Density of glass of chamber
speed of gas molecules
According to Law of Equipartition of Energy
Energy of the system of particles is equally distributed amongst various degrees of freedom
energy possessed by each particle in each degree of freedom is KT/2
All the above
Unit of Specific heat in SI unit is:
J/kg/K
erg/gm/K
erg/Kg/K
All the Above
According to Distribution Law, r.m.s speed is
m3kT
mπ3kT
mπ8KT
m2kT
A gas is at temperature 80°C and pressure 5 × 10-10N m-2. What is the number of molecules per m3 if Boltzmann’s constant is 1.38 × 10-23 J /K
1.8X1011
1.02X1011
6.02x1023
3.2x1023
During an adiabatic process, the pressure of a mixture of monatomic and diatomic gases is found to be proportional to the cube of the temperature. Find the value of γ = (Cp/CV)
1.3
1.5
1.4
1
An oxygen molecule is travelling in air at 300 K and 1 atm, and the diameter of oxygen molecule is 1.2 × 10−10m. Calculate the mean free path of oxygen molecule.
0.63x10-6 m
2.6x10-6 m
10.61x10-6 m
6.6x10-6 m
A football at 27°C has 0.5 mole of air molecules. Calculate the internal energy of air in the ball.
2069.75J
1688.75J
1869.75J
1695.5J
