A vessel contains 1 mole of O2 gas (molar mass 32) at temperature T. The pressure of the gas is P. An identical vessel containing one mole of He (molar mass 4) at a temperature 2T has a pressure of
P/8
P
8P
2P
At what temperature is the r.m.s. speed of molecules of hydrogen twice that at S.T.P. ?
273 K
546 K
819 K
1092 K
An absolute zero is the temperature at which:
Water solidifies
All gases become liquid
rms velocity become zero
Temperature equal to 0 fahrenheit.
Temperature of oxygen kept in a vessel is raised by 10C at constant volume. Heat supplied to the gas may be taken partly as translational and partly rotational kinetic energies. Their respective shares are:
60%, 40%
50%, 50%
100%, zero
40%, 60%
The Surface of the lake is at 20C and depth of the lake is 20m. Find the temperature of the bottom of the lake ?
20C
30C
40C
552 0C
If an oxygen atom and hydrogen atom are having the same temperature, then ratio of their average kinetic energy is
1 : 1
2 : 1
4 : 1
1 : 4
An ideal gas is heated from 270C to 6270C at constant pressure. If initial volume was 4 m3, then the final volume of the gas will be:
2 m3
4 m3
6 m3
12 m3
What is the absolute mass of an atom of oxygen? Atomic mass of oxygen is 16 and Avogadro's number =
The ratio of the speed of sound in nitrogen gas to that in helium gas, at 300 K is:
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