Consider a sample of water in a closed container. When the reaction...?

...H2O(l) H2O(g) has reached equilibrium what can we say about any specific water molecule?

if it was present in the liquid it will remain in the liquid
if it was present in the vapor it will remain in the vapor
it will sometimes be in the liquid phase and sometimes in the vapor phase
both (a) and (b) are true

Answer:
Only C

Both A & B are not true. Molecules continually partition between liquid and gas phases

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Consider a sample of water in a closed container. When the reaction...?

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