The number of degrees of freedom for a diatomic gas molecule is:
2
3
5
6
A polyatomic gas with n degrees of freedom has a mean energy per molecule given by :
A vessel contains 1 mole of O2 gas (relative molar mass 32) at a temperature T. The pressure of the gas is P. An identical vessel containing one mole of He gas (relative molar mass 4) at a temperature 2T ,the pressure will be :
P/8
P
2 P
8 P
A given amount of gas at 20o C has a pressure P. The temperature at which the pressure will be 2 P (at constant volume) is approximately
113o C
40o C
213o C
313o C
In thermal equilibrium, the average velocity of a gas molecule is
proportional to T3
proportional to T2
proportional to
zero
When the temperature of a gas filled in a closed vessel is increased by 1o C, its pressure increases by 0.4 %. The initial temperature of the gas was
25o C
250 K
250o C
25 K
If a gas has n degrees of freedom, ratio of specific heat of gas is:
The average translational kinetic energy of O2 molecules (relative molar mass 32) at a particular temperature is 0.048 eV. The translational kinetic energy of N2 molecules (relative molar mass 28) in eV at the same temperature is:
0.0015
0.003
0.048
0.768
At 0 K, which of the following properties of a gas will be equal to zero?
kinetic energy
Potential energy
Vibrational energy
Density
From the following statements concerning ideal gas at any given temperature T, select the correct one(s) :
The co-efficient of volume expansion at constant pressure is the same for all ideal gases.
The average translational kinetic energy per molecule of oxygen gas is 3 kT, k being Boltzmann constant
The mean-free path of molecules increases with increases in the pressure.
In a gaseous mixture, the average translational kinetic energy of the molecules of each component is different.
