Three perfect gases at absolute temperatures T1, T2, and T3 are mixed. The masses of molecules are m1, m2, and m3 and the number of molecules are Tn1, n2, and n3 respectively. Assuming no loss of energy, the final temperature of the mixture is:
A container has N molecules at absolute temperature T. If the number of molecules is doubled but kinetic energy in the box remains the same, the absolute temperature of the gas is
T
2T
T/2
zero
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
The number of degrees of freedom for molecules of a monoatomic gas is
3
4
5
6
A polyatomic gas with n degrees of freedom has a mean energy per molecule given by :
In an adiabatic change, the pressure and temperature of a monatomic gas are related as , where c equals:
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
One kg of a diatomic gas is at a pressure of 8×104N/m2. The density of the gas is 4 kg/m3. What is the energy of the gas due to its thermal motion?
3×104 J
5×104 J
6×104 J
7×104 J
the average velocity of a gas becomes 4 times, then what will be the effect on rms velocity at the same temperature?
1.4 times
4 times
3 times
2 times
The ratio of the speed of sound in nitrogen gas to that in helium gas, at 300 K is:
