Question
The slope of one of these curves is equal to change in specific entropy over change in specific volume. For 10 points each:
[10m] Name these curves. The chemical potential of each phase is equal along one of these curves.
ANSWER: coexistence curves [or binodals; prompt on phase boundaries or descriptive answers of the boundaries between phases on phase diagrams]
[10e] The two phases along a coexistence curve therefore exist in this state. Systems not in this state will adjust to reach it by Le Chatelier’s principle.
ANSWER: phase equilibrium [or chemical equilibrium]
[10h] In a two component system, the coexistence curve and spinodal intersect at these two points, between which the system exists as a partially miscible liquid. Between these two points, the water-phenol system forms two phases, one with phenol dissolved in water, one with water dissolved in phenol.
ANSWER: the lower and upper critical solution temperatures [or LCST and UCST; prompt on critical solution temperatures or CST]
<Chen, Chemistry>
Summary
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Data
| UNC A | UNC Hunny | 10 | 10 | 0 | 20 |