If an ideal gas has volume V at 270C and it is heated at a constant pressure, so that its volume becomes 1.5 V, then the value of final temperature is:
327 K
1770C
873 K
6000C
During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio Cp / Cv for the gas is:
4/3
2
5/3
3/2
The ratio of the vapour densities of two gases at a given temperature is 9:8. The ratio of the rms velocities of their molecules is:
9:8
8:9
The r.m.s. velocity at a temperature is 2 times the r.m.s. velocity at 300 K. What is this temperature?
900 K
2400 K
600 K
1200 K
Two gases of equal masses are in thermal equilibrium. If Pa, Pb and Va, Vb are their respective pressures and volumes, then which relation is true?
2Pa Va = Pb Vb
Pa ≠ Pb, Va ≠ Vb
Pa / Va = Pb / Vb
Pa Va = Pb Vb
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.
A thermally insulated vessel contains an ideal gas of molecular mass M and the ratio of specific heat is γ. It is moving with speed v and is suddenly brought to rest. Assuming no heat is lost to the surroundings, its temperature increases by :
At 0 K, which of the following properties of a gas will be equal to zero?
kinetic energy
Potential energy
Vibrational energy
Density
At which of the following temperature would the molecules of gas have twice the average kinetic energy they have at 200C?
400C
800C
5860C
3130C
If a gas has n degrees of freedom, ratio of specific heat of gas is: