Question:medium

The number of degrees of freedom for liquid water and water vapour in equilibrium at a pressure of 1 atm is

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Degrees of freedom correspond to independent variables that can vary; for equilibrium, these are restricted.
Updated On: Feb 10, 2026
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The Correct Option is A

Solution and Explanation

At equilibrium, a two-phase (liquid and vapor) system has zero degrees of freedom because its temperature and pressure are constant.
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