Phase Diagrams

Key Questions

• How can phase diagrams be used?

  Phase diagrams can be used to determine the conditions under which substances will undergo a change of state (change of phase).

  For example, a phase diagram for water will tell you which state water will be in at a given temperature and pressure. You could also use the phase diagram to determine the conditions which would lead to different phase change processes (melting, boiling, sublimation, deposition etc.)

  Here is a video which discusses phase diagrams (start at 3:00, first portion of video discusses the heating curve of water).

  Hope this helps...
  Noel P.

  mrpauller.weebly.com · 1 · Sep 26 2014

• How do phase diagrams work?
• How is a phase diagram for water different?
• How do you construct a phase diagram?
• How do you draw a phase diagram with a differential equation?
• What is a 3D phase diagram?
• How can phase diagrams be used?
• Can phase diagrams be constructed from cooling curves?
• How can I construct binary phase diagrams?
• How can I 2D phase diagrams?
• What are crystal phase diagrams?
• How can I interpret phase diagrams?
• What other thermodynamic properties besides temperature and pressure may be graphed in phase diagrams?
• Can entropy be graphed in a phase diagram?
• What type of phase diagram should I draw if more than one pure component present?
• Question #8fe7a
• Question #389db
• Question #0b80d
• What is the critical temperature of water?
• What are the 6 phase changes along a heating curve?
• What is a ternary phase diagram?
• What does the phase diagram of water look like?
• How do you use a phase diagram?
• How do you read phase diagrams?
• What is a binary phase diagram?
• How would you explain the phase diagram of sulphur?
• How can you tell density from a phase diagram?
• What is unusual about the phase diagram for water?
• Question #8fa39
• How would you use the phase diagram of water to explain why ice at the bottom of a glacier can melt when the rest of the glacier which is the same temperature remains solid?
• Why is the phase diagram of water so odd?
• What does a positive or negative liquid-solid slope indicate in a phase diagram?
• At 1 atm and a temperature of 0 celcius which phase of #H_2O# can exist? Why?
• How do I make a phase diagram for water?
• What is the phase diagram of water?
• How was the phase diagram of water developed?
• How does the water phase diagram differ from those of most substances?
• How is water's phase diagram unique?
• How do you read the phase diagram of water?
• What are the phase diagrams of water and carbon dioxide?
• Why does the phase diagram of water have a negative slope?
• Why does the phase diagram of water have a negative slope?
• What is the phase diagram for water?
• What are the phase diagrams for water and #CO_2#?
• Using the phase diagram for #CO_2#, what phase is carbon dioxide in at -20 C and 1 atm pressure?
• Using the phase diagram for #H_2O#, what phase is water in at 1 atm pressure and -5 C?
• What do the sections between the lines on a phase diagram represent?
• How are the conditions of pressure and temperature shown on a [phase] diagram at which two phases coexist in equilibrium?
• What would be most helpful to find the normal melting point and normal boiling point on a phase diagram?
• What do the sections between the lines on the phase diagram below represent?
• Using the phase diagram for #CO_2#, what phase is carbon dioxide in at -60#"^@#C and 15 atm pressure?
• Question #7f49f
• What is the profile of the graph of temperature versus time, when water as a block ice is heated, and the temperature of the ice, water, and steam are periodically monitored?
• Question #c29e5
• What new pressure must be overcome for water to boil at #40^@ "C"#? #DeltabarH_(vap) = "40.65 kJ/mol"# for water at #25^@ "C"# and #"1 atm"#.
• The figure shows two phase diagrams, one for a pure liquid (black line) and the other for a solution made using the liquid as the solvent (red line). What does point B represent?
• Using the phase diagram for #H_2O#, how would you describe water at 0°C and 1 atm?