What is the degree of freedom for a system comprising liquid water equilibrium with its vapour?
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Answer: Option 2
Given, vapor-liquid equilibrium : Number of components \[\left( {{\rm{water}}} \right) = 1\] Number of phases involved \[\left( {{\rm{vapor - liquid}}} \right) = 2\] So, degree of freedom : \[\begin{array}{l} \left( f \right) = C - \emptyset + 2\\ 1 - 2 + 2 = 1 \end{array}\]
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