Help with Phase Diagrams

Practice Questions

High School Chemistry › Help with Phase Diagrams

Questions
6
1

Which of the following is not a phase transition?

2

What does critical temperature describe?

3

What phase is determined by the inability to distinguish liquid from gas?

4

Carbon dioxide does not have a liquid phase under standard conditions. Instead, it transitions from a solid to a gas as temperature increases. Based on this information, which of the following statements is true?

5

Heating curves are used to graph the change in temperature as heat is added to a system. A solid system is heated until it is converted to a gas, and the heating curve is graphed. Why does the heating curve have two horizontal plateaus?

6

On an energy diagram for water, in which temperature is graphed against energy input, the temperature of liquid water will increase up to . At this point, the temperature will plateau even as more energy is added. After this brief plateau, the temperature of the water will rise above .

What value is given by the length of this plateau along the x-axis?

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