Question

calculate the phase components and degree of freedom for a mixture of ice water and vapors at a triple point?​

Answer 1

Answer:

Besides liquid water and water vapor, at the triple point ice has to be present as well. The degree of freedom is zero: from the phase rule f = c + 2 - p = 1 + 2 - 3 = 0, where c are the independent components in the system (here, just one: H2O), p are the phases (here solid, liquid, and vapor phases) and 2 are the intensive physical variables (pressure and temperature) . The result f = 0 means that neither temperature nor pressure may be changed, if we want the system continues to be formed by the same number (three) and kind (solid, liquid, gaseous) of phases as before that change was attempted.