139254 The molecules in an ideal gas at $27^{\circ} \mathrm{C}$ have a certain mean velocity. At what approximate temperature, will the mean velocity be doubled?

139256 The energy per mole per degree of freedom of an ideal gas is

139257 A mixture of two gases is contained in a vessel. The gas 1 is mono atomic and gas 2 is diatomic and the ratio of their molecular masses $M_{1} / M_{2}$ $=1 / 4$. What is the ratio of root mean square speeds of the molecules of two gases?

139258 The average kinetic energy of a gas molecule at $27^{\circ} \mathrm{C}$ is $6.21 \times 10^{-21} \mathrm{~J}$, then its average kinetic energy at $227^{\circ} \mathrm{C}$ is:

139259 A cubical box with porous walls containing an equal number of $\mathrm{O}_{2}$ and $\mathrm{H}_{2}$ molecules is placed in a large evacuated chamber. The entire system is maintained at constant temperature $T$. The ratio of $V_{\text {rms of }} \mathrm{O}_{2}$ molecules to that of the $V_{\text {rms }}$ of $\mathrm{H}_{2}$ molecules, found in the chamber outside the box after a short interval is

139254 The molecules in an ideal gas at $27^{\circ} \mathrm{C}$ have a certain mean velocity. At what approximate temperature, will the mean velocity be doubled?

139256 The energy per mole per degree of freedom of an ideal gas is

139257 A mixture of two gases is contained in a vessel. The gas 1 is mono atomic and gas 2 is diatomic and the ratio of their molecular masses $M_{1} / M_{2}$ $=1 / 4$. What is the ratio of root mean square speeds of the molecules of two gases?

139258 The average kinetic energy of a gas molecule at $27^{\circ} \mathrm{C}$ is $6.21 \times 10^{-21} \mathrm{~J}$, then its average kinetic energy at $227^{\circ} \mathrm{C}$ is:

139259 A cubical box with porous walls containing an equal number of $\mathrm{O}_{2}$ and $\mathrm{H}_{2}$ molecules is placed in a large evacuated chamber. The entire system is maintained at constant temperature $T$. The ratio of $V_{\text {rms of }} \mathrm{O}_{2}$ molecules to that of the $V_{\text {rms }}$ of $\mathrm{H}_{2}$ molecules, found in the chamber outside the box after a short interval is

139254 The molecules in an ideal gas at $27^{\circ} \mathrm{C}$ have a certain mean velocity. At what approximate temperature, will the mean velocity be doubled?

139256 The energy per mole per degree of freedom of an ideal gas is

139257 A mixture of two gases is contained in a vessel. The gas 1 is mono atomic and gas 2 is diatomic and the ratio of their molecular masses $M_{1} / M_{2}$ $=1 / 4$. What is the ratio of root mean square speeds of the molecules of two gases?

139258 The average kinetic energy of a gas molecule at $27^{\circ} \mathrm{C}$ is $6.21 \times 10^{-21} \mathrm{~J}$, then its average kinetic energy at $227^{\circ} \mathrm{C}$ is:

139259 A cubical box with porous walls containing an equal number of $\mathrm{O}_{2}$ and $\mathrm{H}_{2}$ molecules is placed in a large evacuated chamber. The entire system is maintained at constant temperature $T$. The ratio of $V_{\text {rms of }} \mathrm{O}_{2}$ molecules to that of the $V_{\text {rms }}$ of $\mathrm{H}_{2}$ molecules, found in the chamber outside the box after a short interval is

139254 The molecules in an ideal gas at $27^{\circ} \mathrm{C}$ have a certain mean velocity. At what approximate temperature, will the mean velocity be doubled?

139256 The energy per mole per degree of freedom of an ideal gas is

139257 A mixture of two gases is contained in a vessel. The gas 1 is mono atomic and gas 2 is diatomic and the ratio of their molecular masses $M_{1} / M_{2}$ $=1 / 4$. What is the ratio of root mean square speeds of the molecules of two gases?

139258 The average kinetic energy of a gas molecule at $27^{\circ} \mathrm{C}$ is $6.21 \times 10^{-21} \mathrm{~J}$, then its average kinetic energy at $227^{\circ} \mathrm{C}$ is:

139259 A cubical box with porous walls containing an equal number of $\mathrm{O}_{2}$ and $\mathrm{H}_{2}$ molecules is placed in a large evacuated chamber. The entire system is maintained at constant temperature $T$. The ratio of $V_{\text {rms of }} \mathrm{O}_{2}$ molecules to that of the $V_{\text {rms }}$ of $\mathrm{H}_{2}$ molecules, found in the chamber outside the box after a short interval is

139254 The molecules in an ideal gas at $27^{\circ} \mathrm{C}$ have a certain mean velocity. At what approximate temperature, will the mean velocity be doubled?

139256 The energy per mole per degree of freedom of an ideal gas is

139257 A mixture of two gases is contained in a vessel. The gas 1 is mono atomic and gas 2 is diatomic and the ratio of their molecular masses $M_{1} / M_{2}$ $=1 / 4$. What is the ratio of root mean square speeds of the molecules of two gases?

139258 The average kinetic energy of a gas molecule at $27^{\circ} \mathrm{C}$ is $6.21 \times 10^{-21} \mathrm{~J}$, then its average kinetic energy at $227^{\circ} \mathrm{C}$ is:

139259 A cubical box with porous walls containing an equal number of $\mathrm{O}_{2}$ and $\mathrm{H}_{2}$ molecules is placed in a large evacuated chamber. The entire system is maintained at constant temperature $T$. The ratio of $V_{\text {rms of }} \mathrm{O}_{2}$ molecules to that of the $V_{\text {rms }}$ of $\mathrm{H}_{2}$ molecules, found in the chamber outside the box after a short interval is