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  3. Chemistry
  4. A liquid is in equilibrium with its vapour at its boiling point. On the average, the molecules in two phases have equal--

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Q. A liquid is in equilibrium with its vapour at its boiling point. On the average, the molecules in two phases have equal--

WBJEEWBJEE 2007

Solution:

ln liquid $\ce{<=> }$ vapour, equilibrium the rate at which molecules escape from the liquid surface to gaseous phase equals to rate at which molecules in the gas phase strike the surface and becomes the part of liquid. Hence, the molecules in the two phases have equal kinetic energy.