Phase Diagram PDF

 CO₂ or dry ice Project analysis slide 2  PHASE DIAGRAM (INTERMOLICULAR FORCE)  Activity 1: Explore the features of phase diagram. Project analysis slide 3 Identify the three areas of Critical Point matter; the three lines or curve proce...

 CO₂ or dry ice Project analysis slide 2  PHASE DIAGRAM (INTERMOLICULAR FORCE)  Activity 1: Explore the features of phase diagram. Project analysis slide 3 Identify the three areas of Critical Point matter; the three lines or curve process or transition between phases, the conditions, the two Triple point important points  Critical Point 1. What is a phase diagram? Triple point  Critical Point 1. What is a phase diagram? A graphical representation of the Triple point physical states of a substance under different conditions of temperature and pressure.  Critical Point 2. What point on a phase diagram at which the three states of matter coexist? Triple point  Critical Point 2. What point on a phase diagram at which the three states of matter coexist? Triple point Triple Point 3. What are the lines Critical Point (or curves) that serve as boundaries between the phase changes at which two phases can exist in Triple point equilibrium? 3. What are the lines Critical Point (or curves) that serve as boundaries between the phase changes at which two phases can exist in Triple point equilibrium? Melting (or freezing) curve, Vaporization (or condensation) curve, 4. How are the normal melting and boiling points determined in a phase diagram? 4. How are the normal melting and boiling points determined in a phase diagram? The normal melting and boiling points are those when the pressure is 1 atmosphere. These can be found from the phase diagram by 5. What are the features of a phase diagram? 5. What are the features of a phase diagram? Phase diagrams are plots of pressure versus temperature. The diagram is divided into three areas: solid, liquid, and gaseous states. The boundaries between the liquid and gaseous region 6. What do you call point C in the diagram and what happened in this phase? How about beyond this point? 6. What do you call point C in the diagram and what happened in this phase? How about beyond this point? This is called the Critical point where the curve ends. This point in temperature and pressure on a phase diagram is where the liquid and gaseous phases of a substance merge together into a single phase. beyond this point, The liquid and Project analysis slide 3 Critical Point Triple point ivity2: Compare and Interpret Multiple Choice: Choose the letter of your choice from the given options (a,b,c,d) 1. What is the normal melting point of the substance? a. ≈32 °C b. ≈39 °C c. ≈22 °C d. 23°C 2. What phase(s) will exist at 1 atm and 70°C? liquid and vapor (gas) 3. At what pressure and temperature conditions will all three phases of the substance be present? a. ≈0.7 atm and ≈30°C b. ≈0.5 atm and ≈28°C c. ≈0.5 atm and ≈20°C d. ≈1 atm and ≈20°C 1. Compare the differences and Interpreting the Phase Diagrams of Water and Carbon Dioxide. Assignment: Constructing a Phase Diagram Construct a Phase diagram of a substance with the following points on the phase diagram: a triple point at 0.05 atm and 150 K; a normal melting point at 175 K; a normal boiling point at 350 K; and a critical point at 2.0 atm and 450 K. The solid-liquid line is “normal” (meaning positive sloping). For this, complete the following: 1. Roughly sketch the phase diagram, using units of atmosphere and Kelvin. Label the areas 1, 2, and 3, and points T and C on the diagram. 2. Describe what one would see at pressures and temperatures above 2.0 atm and 450 K. 3. Describe the phase changes from 50 K to 250 K at 1.5 atm. 4. What exists in a system that is at 1 atm and 350 K? 5. What exists in a system that is at 1 atm and 175 K? Thank You