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A closed flask contains water in all its three states solid, liquid and vapour at 0°C. In this situation, the average kinetic energy of water molecules will be[1992]
  • a)
    the greatest in all the three states
  • b)
    the greatest in vapour state
  • c)
    the greatest in the liquid state
  • d)
    the greatest in the solid state
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A closed flask contains water in all its three states solid, liquid an...
Velocity and hence the K.E is  maximum in the gaseous state.
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A closed flask contains water in all its three states solid, liquid an...
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.
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Community Answer
A closed flask contains water in all its three states solid, liquid an...
°C. At this temperature, the water is said to be in a state of equilibrium. This means that the rate of water molecules evaporating from the liquid phase is equal to the rate of water molecules condensing back into the liquid phase. The solid ice and the liquid water are also in equilibrium, with the rate of ice melting being equal to the rate of liquid water freezing.

In this closed system, the amount of water molecules in each state remains constant over time. When a water molecule evaporates from the liquid phase and condenses back into the liquid phase, the number of water molecules in each state does not change. Similarly, when a water molecule melts from the solid ice phase and freezes back into the solid ice phase, the number of water molecules in each state does not change.

This equilibrium is maintained due to the balance between the energy gained and lost by the water molecules. At 0°C, the average kinetic energy of the water molecules is relatively low, but there is still enough energy for some molecules to overcome the intermolecular forces and transition into the vapor phase. At the same time, some water molecules in the vapor phase lose enough energy to condense back into the liquid phase or freeze into the solid phase.

Overall, the closed flask containing water in all its three states at 0°C represents a dynamic equilibrium, where the rates of phase transitions are equal and the amount of water molecules in each state remains constant.
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A closed flask contains water in all its three states solid, liquid and vapour at 0°C. In this situation, the average kinetic energy of water molecules will be[1992]a)the greatest in all the three statesb)the greatest in vapour statec)the greatest in the liquid stated)the greatest in the solid stateCorrect answer is option 'B'. Can you explain this answer?
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