A phase diagram is a type of chart used to show conditions (pressure, temperature, volume, etc.) We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Mark on the diagram the areas corresponding to ice, liquid water, and water vapor. C. 2)If you were to have a bottle containing compound X in your closet, what phase would it most likely be in? In your own words, what is the definition of a triple point? If the temperature was then increased at constant pressure, what state(s) would the substance be in at points 10, and 11? Answer the questions below in relation to the following generic phase diagram. Some industrial process require carbon dioxide. Explain what curve 1 represents, and why it slopes backwards unlike the corresponding curve 1 in the last diagram. on the phase of a substance: The CURVES indicate the conditions of temperature and pressure under which “equilibrium” between different phases of a substance can exist. 5. 14. BOTH phases exist on these lines: and . Worksheet – Phase Diagrams 1. We'll discuss these when they become relevant. and . Suppose you had the following phase diagram for a simple pure substance: The next phase diagram looks at the effect of changing pressure at constant temperature. Bromine sublimes when the temperature is –25 0C and the pressure is 101.3 kPa. on the phase of a substance: The CURVES indicate the conditions of temperature and pressure under which “equilibrium” between different phases of a substance can exist. Pure Phases and their Transitions (Worksheet), [ "article:topic", "Phase transition", "authorname:clarkj" ], Former Head of Chemistry and Head of Science. What state(s) would the substance be in at each of points 2 to 5? PHASE DIAGRAM WORKSHEET #2 Name_____ Period_____ Date_____ At standard temperature and pressure, bromine (Br 2) is a red liquid. For each of the following questions (16-28), refer to the phase diagram for tastegudum. 4. Figure \(\PageIndex{1}\): A typical phase diagram. If you think about the three lines which meet at that point, they represent the point that liquid, solid and gas coexist. For the following two questions consider the two lines on the phase diagram below: This is the phase diagram for carbon dioxide with some values marked on it: Solid carbon dioxide is commonly known as “dry ice”. There are usually two major distortions. You should try to answer the questions without accessing the Internet. ~770. pressure. Liquid water has the highest specific heat of all liquids except for NH3(True, False) True 2. The phase diagram of an alloy made of components A and B, for all combinations of Tand X The LibreTexts libraries are Powered by MindTouch® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. 2) What is the normal melting point of this substance? Missed the LibreFest? The "C" point is known as the critical point. pressure. Use the diagram above to explain how that term arises. Phase Diagram Worksheet Name: _____ A . Part A – Generic Phase Diagram. 1)What is the critical temperature of compound X? Draw a small blue circle around the point that is the triple point for tastegudum. Directions: Refer to the phase diagram below when answering the following questions. Give the state(s) at each of the points 4 to 8. Have questions or comments? 7) What are the values for temperature and pressure at STP? _____ 10) What is the phase (s, l, g) of a substance at 1.5 atm and 50 °C? The phase diagram for bromine is shown below. Explain why most solids have a very steep curve, sloping slightly forwards as pressure increases. Which section represents the solid phase? ~1000 C 3) What is the normal boiling point of this substance? Point T on the diagram is called the triple point. Part D – Phase Diagram for Tastegudum. What section represents the liquid phase? What letter represents the triple point? Suppose at a much lower pressure, the substance was under the conditions at point 6. Give the state(s) at each of the points 1 to 3. 2. _____ 9) What is the phase (s, l, … Common components of a phase diagram are lines of equilibrium or phase boundaries, which refer to lines that mark conditions under which multiple phases can coexist at equilibrium. A phase diagram is a type of chart used to show conditions (pressure, temperature, volume, etc.) On Crosbia, bolonium (Bg) and manasium (Ma) react together to form the compound tastegudum. For each of the questions on this worksheet, refer to the phase diagram for mysterious compound X. The graph was drawn from data collected as a substance was heated at a constant rate. c. Suppose the constant pressure was 1 atmosphere. Phase Diagram Worksheet Answers Refer to the phase diagram below when answering the questions on this worksheet: 1) Label the following on the phase diagram above: Solid phase, liquid phase, gas phase, triple point, critical point. Use this diagram for questions (1) – (9) (1) Label each region of the graph as solid, liquid, or gas. See Miss Scott for answer key with labels. at which thermodynamically distinct phases occur and coexist at equilibrium (at topic later on in the course). Describe what happens to the substance as you increase the temperature from point 6 to point 8. BOTH phases exist on these lines: Liquid water has the highest specific heat of all liquids except for NH3 (True, False) True 2. at which thermodynamically distinct phases occur and coexist at equilibrium (at topic later on in the course). What would be the state of the substance at point 9? Label the regions of the diagram that correspond to the solid, liquid, and vapor phases. The molecular viscosity of water is less than most liquids at comparable temperatures (True, False) True 3. Phase transitions occur along lines of equilibrium. For more information contact us at info@libretexts.org or check out our status page at https://status.libretexts.org. Name, and explain the significance of, the point labeled T on these diagrams? Phase Diagram Worksheet Name: _____ A . Phase Change Worksheet. The molecular viscosity of water is less than most liquids at comparable temperatures (True, False) True 3. Work in groups on these problems. At point A, the beginning of observations, the substance exists in a solid state. Use the graph to answer the following questions. _____ 9) What is the phase (s, l, g) of a substance at 0.75 atm and 100 °C? Legal. The phase diagram for bromine is shown below. At 1 atmosphere and room temperature (25 C), would you expect solid carbon dioxide to melt to the liquid phase, or sublime to the gas phase? Phase Diagram Worksheet. What useful information can you get from the diagram about the simple physical properties of the substance? Material in this phase has _____ volume and _____ shape. Draw a small red circle around the point that is the critical point for tastegudum. Phase Diagram Worksheet Answers Refer to the phase diagram below when answering the questions on this worksheet: 1) Label the following on the phase diagram above: Solid phase, liquid phase, gas phase, triple point, critical point. These diagrams (including this one) are nearly always drawn highly distorted in order to see what is going on more easily. Directions: Refer to the phase diagram below when answering the following questions. PHASE DIAGRAM WORKSHEET . A phase diagram(or equilibrium diagram) is a diagram with Tand composition as axes, showing the equilibrium constitution. What section represents the gas phase? If you look at Figure \(\PageIndex{1}\), you will see that there are three lines, three areas marked "solid", "liquid" and "vapour", and two special points marked "C" and "T". Watch the recordings here on Youtube! Use this diagram … 7) What are the values for temperature and pressure at STP? What physical state would the substance be in under the conditions at point 1?