If temperature changes from 27oC to 127oC, the relative percentage change in rms velocity is
1.56
2.56
15.6
82.4
If helium is allowed to expand in vacuum, it liberates heat because
helium is an inert gas
helium is an ideal gas
the inversion temperature of helium is very low
helium is one of the lightest gases.
Given : rms velocity of hydrogen at 300 K is 1.9 × 103 m/s . The rms velocity of oxygen at 1200 K will be
1.9 × 103 m/s
3.8 × 103 m/s
0.95 × 103 m/s
0.475 × 103 m/s
Equal weights of CH4 and H2 are mixed in a container at 25oC. Fraction of total pressure exerted by methane is
1/2
1/3
1/9
8/9
Vander Waals' equation of state is obeyed by real gases. For n moles of a real gas, the expression will be
By the ideal gas law, the pressure of 0.60 mole NH3 gas in a 3.00 L vessel at 25oC is
48.9 atm
4.89 atm
0.489 atm
489 atm
