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A vessel contains an ideal gas at pressure P and temperature T. If the root mean square speed of the gas molecules doubles, keeping the volume constant, the new pressure P' will be:
4P
2P
P/2
P/4
At what temperature will the average translational kinetic energy of a gas molecule be equal to the energy required to break a bond of energy 2 eV? (Boltzmann constant , )
1.86 x 10 K
3.72 x 10 K
9.3 x 10 K
2.48 x 10 K
Two identical flasks contain different gases at the same temperature and pressure. Flask A contains and Flask B contains . Which of the following statements is true regarding the average speed of the gas molecules?
The average speed of molecules is greater than that of molecules.
The average speed of molecules is greater than that of molecules.
The average speeds of both gases are equal.
The average speed cannot be determined without knowing the volume of the flasks.
Which of the following statements is NOT an assumption of the Kinetic Molecular Theory of Gases, which is modified by the van der Waals equation?
Gas molecules have negligible volume.
Gas molecules have significant volume.
Gas molecules exert no attractive or repulsive forces on each other.
Gas molecules collide elastically with each other and the walls of the container.
As the speed of molecules increases, the number of collisions per second:
Decreases
Increases
Does not change
None of these
Which of the following statement is not true?
The pressure of a gas is due to collision of the gas molecules with the walls of the container.
The molecular velocity of any gas is proportional to the square root of the absolute temperature.
The rate of diffusion of a gas is directly proportional to the density of the gas at constant pressure.
Kinetic energy of an ideal gas is directly proportional to the absolute temperature.
A gas will approach ideal behaviour at
Low temperature and high pressure
Low temperature and low pressure
High temperature and low pressure
High temperature and high pressure
A gas will approach ideal behaviour at
Low temperature and high pressure
Low temperature and low pressure
High temperature and low pressure
High temperature and high pressure
The temperature at which nitrogen under 1.00 atm pressure has the same root mean square as that of carbon dioxide at STP, is
0\,^\circ C
27\,^\circ C
- 99\,^\circ C
- 200\,^\circ C
