All AP Chemistry Resources
Example Questions
Example Question #1 : Phase Diagrams
What is the definition of the triple point?
Possible Answers:
The condensation line of the phase diagram
The state where liquid and gas cannot be differentiated
The state where solid, liquid, and gas coexist in equilibrium
None of these
The point in which temperature change has no effect on the substance
Correct answer: The state where solid, liquid, and gas coexist in equilibrium
Explanation:
Definition of triple point: where solid, liquid, and gas exist in equilibrium
Example Question #2 : Phase Diagrams
What is represented by point D
Possible Answers:
Critical point
liquid phase
evaporation
Triple point
condensation
Correct answer:
Critical point
Explanation:
the critical point is where the solid and gas cannot be distinguished
Example Question #1 : Phase Diagrams
A solution of water is at 0.006atm and 0.01 degrees Celsius. What phase(s) are present in the sample?
Possible Answers:
Solid and liquid
Solid and gas
Liquid only
Solid, liquid, and gas
Liquid and gas
Correct answer:
Solid, liquid, and gas
Explanation:
The point detailed in the question is the triple point of water on the phase diagram. At the triple point all three phases of a chemical coexist; as such the correct answer is solid, liquid, and gas.
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