314235
A closed flask contains \(\mathrm{\mathrm{H}_{2} \mathrm{O}}\) in all its three states solid, liquid and vapour at \(\mathrm{0^{\circ} \mathrm{C}}\). In this the average K.E. of water molecules will be
1 same in all three states
2 greatest in the vapour state
3 greatest in the solid state
4 greatest in the liquid than in the vapour state
Explanation:
In the three states of matter, the maximum kinetic energy is possessed by the gaseous molecules, so water vapour state has maximum kinetic energy in this situation.
CHXI06:STATES OF MATTER
314236
The ratio of kinetic energies of \(\mathrm{2 \mathrm{~g}}\) of \(\mathrm{\mathrm{H}_{2}}\) and \(\mathrm{4 \mathrm{~g}}\) of \(\mathrm{\mathrm{CH}_{4}}\) at a given temperature is
1 \(\mathrm{4: 1}\)
2 \(\mathrm{2: 32}\)
3 \(\mathrm{1: 4}\)
4 \(\mathrm{16: 2}\)
Explanation:
K.E. is directly proportional to number of moles. \(\frac{{{{\left( {{\rm{K}} \cdot {\rm{E}} \cdot } \right)}_{{{\rm{H}}_{\rm{2}}}}}}}{{{{\left( {{\rm{K}} \cdot {\rm{E}} \cdot } \right)}_{{\rm{C}}{{\rm{H}}_{\rm{4}}}}}}} = \frac{{{{\rm{n}}_{{{\rm{H}}_{\rm{2}}}}}}}{{{{\rm{n}}_{{\rm{C}}{{\rm{H}}_{\rm{4}}}}}}} = \frac{{{\rm{2/2}}}}{{{\rm{4/16}}}}{\rm{ = 4}}{\rm{.}}\)
CHXI06:STATES OF MATTER
314237
Helium atom is two times heavier than a hydrogen molecule. At \(\mathrm{298 \mathrm{~K}}\), the average kinetic energy of a helium atom is
1 Two times that of hydrogen molecule
2 Same as that of a hydrogen molecule
3 Four times that of a hydrogen molecule
4 Half that of a hydrogen molecule
Explanation:
The average kinetic energy of an atom is given as \(\mathrm{(3 / 2) \mathrm{kT}}\). Therefore, it does not depend on the mass of the atom.
314235
A closed flask contains \(\mathrm{\mathrm{H}_{2} \mathrm{O}}\) in all its three states solid, liquid and vapour at \(\mathrm{0^{\circ} \mathrm{C}}\). In this the average K.E. of water molecules will be
1 same in all three states
2 greatest in the vapour state
3 greatest in the solid state
4 greatest in the liquid than in the vapour state
Explanation:
In the three states of matter, the maximum kinetic energy is possessed by the gaseous molecules, so water vapour state has maximum kinetic energy in this situation.
CHXI06:STATES OF MATTER
314236
The ratio of kinetic energies of \(\mathrm{2 \mathrm{~g}}\) of \(\mathrm{\mathrm{H}_{2}}\) and \(\mathrm{4 \mathrm{~g}}\) of \(\mathrm{\mathrm{CH}_{4}}\) at a given temperature is
1 \(\mathrm{4: 1}\)
2 \(\mathrm{2: 32}\)
3 \(\mathrm{1: 4}\)
4 \(\mathrm{16: 2}\)
Explanation:
K.E. is directly proportional to number of moles. \(\frac{{{{\left( {{\rm{K}} \cdot {\rm{E}} \cdot } \right)}_{{{\rm{H}}_{\rm{2}}}}}}}{{{{\left( {{\rm{K}} \cdot {\rm{E}} \cdot } \right)}_{{\rm{C}}{{\rm{H}}_{\rm{4}}}}}}} = \frac{{{{\rm{n}}_{{{\rm{H}}_{\rm{2}}}}}}}{{{{\rm{n}}_{{\rm{C}}{{\rm{H}}_{\rm{4}}}}}}} = \frac{{{\rm{2/2}}}}{{{\rm{4/16}}}}{\rm{ = 4}}{\rm{.}}\)
CHXI06:STATES OF MATTER
314237
Helium atom is two times heavier than a hydrogen molecule. At \(\mathrm{298 \mathrm{~K}}\), the average kinetic energy of a helium atom is
1 Two times that of hydrogen molecule
2 Same as that of a hydrogen molecule
3 Four times that of a hydrogen molecule
4 Half that of a hydrogen molecule
Explanation:
The average kinetic energy of an atom is given as \(\mathrm{(3 / 2) \mathrm{kT}}\). Therefore, it does not depend on the mass of the atom.
314235
A closed flask contains \(\mathrm{\mathrm{H}_{2} \mathrm{O}}\) in all its three states solid, liquid and vapour at \(\mathrm{0^{\circ} \mathrm{C}}\). In this the average K.E. of water molecules will be
1 same in all three states
2 greatest in the vapour state
3 greatest in the solid state
4 greatest in the liquid than in the vapour state
Explanation:
In the three states of matter, the maximum kinetic energy is possessed by the gaseous molecules, so water vapour state has maximum kinetic energy in this situation.
CHXI06:STATES OF MATTER
314236
The ratio of kinetic energies of \(\mathrm{2 \mathrm{~g}}\) of \(\mathrm{\mathrm{H}_{2}}\) and \(\mathrm{4 \mathrm{~g}}\) of \(\mathrm{\mathrm{CH}_{4}}\) at a given temperature is
1 \(\mathrm{4: 1}\)
2 \(\mathrm{2: 32}\)
3 \(\mathrm{1: 4}\)
4 \(\mathrm{16: 2}\)
Explanation:
K.E. is directly proportional to number of moles. \(\frac{{{{\left( {{\rm{K}} \cdot {\rm{E}} \cdot } \right)}_{{{\rm{H}}_{\rm{2}}}}}}}{{{{\left( {{\rm{K}} \cdot {\rm{E}} \cdot } \right)}_{{\rm{C}}{{\rm{H}}_{\rm{4}}}}}}} = \frac{{{{\rm{n}}_{{{\rm{H}}_{\rm{2}}}}}}}{{{{\rm{n}}_{{\rm{C}}{{\rm{H}}_{\rm{4}}}}}}} = \frac{{{\rm{2/2}}}}{{{\rm{4/16}}}}{\rm{ = 4}}{\rm{.}}\)
CHXI06:STATES OF MATTER
314237
Helium atom is two times heavier than a hydrogen molecule. At \(\mathrm{298 \mathrm{~K}}\), the average kinetic energy of a helium atom is
1 Two times that of hydrogen molecule
2 Same as that of a hydrogen molecule
3 Four times that of a hydrogen molecule
4 Half that of a hydrogen molecule
Explanation:
The average kinetic energy of an atom is given as \(\mathrm{(3 / 2) \mathrm{kT}}\). Therefore, it does not depend on the mass of the atom.
314235
A closed flask contains \(\mathrm{\mathrm{H}_{2} \mathrm{O}}\) in all its three states solid, liquid and vapour at \(\mathrm{0^{\circ} \mathrm{C}}\). In this the average K.E. of water molecules will be
1 same in all three states
2 greatest in the vapour state
3 greatest in the solid state
4 greatest in the liquid than in the vapour state
Explanation:
In the three states of matter, the maximum kinetic energy is possessed by the gaseous molecules, so water vapour state has maximum kinetic energy in this situation.
CHXI06:STATES OF MATTER
314236
The ratio of kinetic energies of \(\mathrm{2 \mathrm{~g}}\) of \(\mathrm{\mathrm{H}_{2}}\) and \(\mathrm{4 \mathrm{~g}}\) of \(\mathrm{\mathrm{CH}_{4}}\) at a given temperature is
1 \(\mathrm{4: 1}\)
2 \(\mathrm{2: 32}\)
3 \(\mathrm{1: 4}\)
4 \(\mathrm{16: 2}\)
Explanation:
K.E. is directly proportional to number of moles. \(\frac{{{{\left( {{\rm{K}} \cdot {\rm{E}} \cdot } \right)}_{{{\rm{H}}_{\rm{2}}}}}}}{{{{\left( {{\rm{K}} \cdot {\rm{E}} \cdot } \right)}_{{\rm{C}}{{\rm{H}}_{\rm{4}}}}}}} = \frac{{{{\rm{n}}_{{{\rm{H}}_{\rm{2}}}}}}}{{{{\rm{n}}_{{\rm{C}}{{\rm{H}}_{\rm{4}}}}}}} = \frac{{{\rm{2/2}}}}{{{\rm{4/16}}}}{\rm{ = 4}}{\rm{.}}\)
CHXI06:STATES OF MATTER
314237
Helium atom is two times heavier than a hydrogen molecule. At \(\mathrm{298 \mathrm{~K}}\), the average kinetic energy of a helium atom is
1 Two times that of hydrogen molecule
2 Same as that of a hydrogen molecule
3 Four times that of a hydrogen molecule
4 Half that of a hydrogen molecule
Explanation:
The average kinetic energy of an atom is given as \(\mathrm{(3 / 2) \mathrm{kT}}\). Therefore, it does not depend on the mass of the atom.
