The r.m.s velocity of nitrogen molecules at N.T.P is
33 m/s
493 m/s
517 m/s
546 m/s
The temperature of H2 at which the rms velocity of its molecules is seven times the rms velocity of the molecules of nitrogen at 300 K is:
2100 K
1700 K
1350 K
1050 K
At Boyle's temperature:
Joule's effect is positive
b of van der Waals' equation is zero
gas obeys Boyle's law
Joule's effect invalid
The kinetic energy of one gm - molecule of a gas at normal temperature and pressure is (R = 8.31 J mol-1 K-1 )
0.56 x 104 J
1.3 x 102 J
2.7 x 103 J
3.4 x 103 J
One mole of monoatomic gas and three moles of diatomic gas are put together in a container. The molar specific heat (in JK-1mol-1) at constant volume (R=8.3 JK-1mol-1) is:
18.7
18.9
19.2
none of these
A gas at a temperature of 250 K is contained in a closed vessel. If the gas is heated through 1 K, then percentage increase in its pressure is
0.1 %
0.2 %
0.3 %
0.4 %
In a vessel, the gas is at a pressure P. If the mass of all the molecules is halved and their speed is doubled, then the resultant pressure will be:
4 P
2 P
P
P/2
The mean kinetic energy of one mole of gas per degree of freedom (on the basis of the kinetic theory of gases) is:
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
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
