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Phase Diagrams

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Wize University Chemistry Textbook > Phase Transitions and Phase Diagrams

Phase Diagrams

6 Activities

Wize University Chemistry Textbook > Phase Transitions and Phase Diagrams

Phase Changes

2 Activities

The heating Curve for Water is shown below


What is happening along the line labelled A?
More Phase Diagrams Questions:
Consider the following phase diagram for an unknown compound X.
What is the normal boiling point of compound X?
Phase Diagrams
The phase diagram of Argon is shown below. Argon has two distinct solid phases α and β.
When the solid-α is more dense than solid-β.
a) Label the phases on the diagram below.
The figure below is a phase diagram for iodine (I2). Use the figure to answer the following two questions
The phase diagram of Argon is shown below. Argon has two distinct solid phases α and β. When the solid-α to solid-β phase transition occurs, heat is given off.
a) Label the sections of the phase diagram with the appropriate phases
b) Which has a higher density solid-α or solid β?
Phase Diagrams: N2
Shown below is a phase diagram forN2{\small \text{N}_2}
Label the phases of the phase diagram, the triple point and the critical point
What is the normal boiling point of N2{\small \text{N}_2}?
Practice: Phase Diagrams
Refer to the phase diagram below for the following questions.
Phase Diagrams
The phase diagram of Argon is shown below. Argon has two distinct solid phases α and β.
When the solid-α is more dense than solid-β.
a) Label the phases on the diagram below.
Shown below is a phase diagram for N2
a) What is the normal boiling point of N2N_2 ? (enter answer in K)
b) What is the normal freezing point of N2N_2? (enter answer in K)
Consider the following phase diagram:
Which of the above locations shows the gas'liquid phase transition line?
Practice: Phase Diagrams
Refer to the phase diagram below for the following questions.
Phase Diagrams
The phase diagram of Argon is shown below. Argon has two distinct solid phases α and β.
When the solid-α is more dense than solid-β.
a) Label the phases on the diagram below.
Intermolecular forces: Phase Diagrams
Using the following phase diagram, can you determine whether the solid or liquid phase is more dense? What is the phase at 5 atm and 35 K? At a pressure of 3 atm, what temperature range would you expect to find a gas? At what approximate temperature and pressure would we expect to find the triple point?
Phase Diagrams
Choose which of the following statements are true:
The critical point on a phase diagram indicates where the liquid and gas phases become identical for a substance
The boiling point of a compound is defined as the temperature where the vapour pressure is equal to the surrounding pressure
Phase Diagram
The point on a phase diagram where all three phases of a substance are in equilibrium is known as:
Phase diagrams
The following phase diagram is of argon gas
(a) Which has a higher density? Solid alpha or beta?
(b) Can solid alpha undergo sublimation?
Phase Diagram: N2
Shown below is a phase diagram for N2
a) What is the normal boiling point of N2N_2 ?
b) What is the normal freezing point of N2N_2?
According to the phase diagram given for substance W, which of the following statements is incorrect?
In the phase diagram below, which is the gas to liquid transition?
The point on a phase diagram where all three phases of a substance are in equilibrium is known as:
Considering the following phase diagram
Which of the following statements is correct?
Considering the following phase diagram
The process that describes the transition from a to b is
Considering the following phase diagram
Which of the following statements is correct?
Shown below is a phase diagram for N2
a) What is the normal boiling point of N2N_2 ?
b) What is the normal freezing point of N2N_2?
Practice: Phase Diagrams
Refer to the phase diagram below for the following questions.
Phase Diagrams
In the phase diagram below, identify the process occurring going from point A to B.
More Phase Changes Questions:
What physical property of water is unusual?
The normal melting point of a solid is:
Which of the following phase changes is referred to as fusion?
Phase changes
Dry ice is used in fire extinguishers. The dry ice is stored in the cylinder in a solid form. When sprayed on a fire it quickly changes into the gas known as carbon dioxide (CO2).
What is this change of state called?
Phase change
When the temperature of a liquid is increased a little, what happens to the particles?
Phase Diagrams
Choose which of the following statements are true:
The critical point on a phase diagram indicates where the liquid and gas phases become identical for a substance
The boiling point of a compound is defined as the temperature where the vapour pressure is equal to the surrounding pressure
Ice Block Question
The Inuit people have known for a long time that ice blocks can be sliced cleanly by laying a string across the ice block and then placing a weight on each side of that string. Explain how placing a weighed string on an ice block will slowly cut through the ice? (Hint: a picture will help.)
Which of the following phase changes are exothermic?
I. Condensation
II. Vapourization