A phase diagram of a one-component system: 7. Point C represents A) equilibrium between ,,, and phases B) equilibrium between ,, and y phases C) equilibrium between , and phases D) no equilibrium between phases E) equilibrium between ,, and phases 8. Point B represents phase equilibrium between A) and B) and C) and D) , and E) None of the above 9. Any point along AB represents equilibrium between phases which A) changes with temperature B) changes with pressure C) changes with and compositions D) does not change with temperature and pressure E) change with temperature and pressure