24. Water plays an important role in traditional ceramics shaping processes. With the help of a suitable diagram, discuss the effect of water volume on the aggregate volume of clay based ceramics. Hence discuss the drying stages for such materials using appropriate diagrams. Page 8 of 12 [10 points]
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- 11. Melting point temperatures are frequently used to help identify unknown solids and determine their purity. How would the melting point of a pure solid sample compare to that of the same solid contaminated by a solid impurity? Explain.7. Water cannot be utilized as an absorbing liquid in the synthesis of sulphuric acid because its vapour pressure is insufficiently low, resulting in the generation of acid mist. true or falseAromatic compound naphthalene melts sharply at 79–81 °C. The melting range will be significantly depressed when very small amounts of impurities are present. Investigate the structure of naphthalene and propose an explanation of why very minor impurities have a very significantly disrupt formation of crystals.
- Find the planer density (Po) in (atom/mm) of (100) in a face centered cubic unit cell with lattice constant of 3.5 A, and determined the atomic radius10-44 Determine the liquidus temperature, soli- dus temperature, and freezing range for the following NiO-MgO ceramic compositions: (a) NiO-30 mol% MgO; (b) NiO-45 mol% MgO; (c) NiO-60 mol% MgO; and (d) NiO-85 mol% MgO. [See Figure 10-8(b).] 2800 2600 2400 L+S 2200 (Ni, Mg)O 2000, 'NiO 20 40 60 80 MgO Mole percent Mg0 (b) Figure 10-8(b) The equilibrium phase diagram for the NiO-MgO system. (Repeated for Problems 10-44, 10-50, 10-53, 10-57, and 10-71.) Temperature (°C)a student obtained a solid product in a laboratory synthesis. to verify the identity of the solid, she measured its melting point and found that the material melted over a 12 degree Celsius range. after it had colled, she measured the melting point of the same sample again and found that this time the solid had a sharp melting point at the temperature that is characteristic of the desired product. why were the two melting points different? ehat was responsible for the change in the melting point?
- 7.Factors to consider in the selection of appropriate methods in specific gravity determination, excepta.Densityb.Polymorphismc.Physical form of the solidd.Solubility in water or the other liquid8.Specific gravity of a solid in flotation method is compared indirectly with a liquid known specific gravity. When the solid will neither sink or rise in the liquid, the specific gravity of the solid is different as the liquid.a.The first statement is correctb.Both statements are incorrectc.Both statements are correctd. The second statement is correctagenow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=Dassignment-take [References) Use the References to access important values if needed for this ques 900 800 Carbon disulfide 700 600 Methanol 500 Ethanol 400 300 Heptane 200 100 0. 10 20 30 40 50 60 70 80 90 100 110 Temperature (°C) From the plot of vapor pressures vs temperature above, estimate the normal boiling point of heptane. °C Submit Answer Try Another Version 2 item attempts remaining Cengage Learning | Cengage Technical Support MacBook Pro 888 Vapor pressure (mm Hg)A.....pdf 3 F3 5 4 - Explain the following trends in surface tension in terms of intra-molecular and intermolecular forces: o F4 Please remember to label your work with your first/last name, course code, module number and activity number. Work that has not been appropriately labelled shall be returned. - Compound 5 Water Glycerol Ethanol F5 O F6 ... & 99+ ASUS ZenBook Surface tension(dyn/cm) 7 F7 F8 71.97 63 22.27 8 04 F9 F10
- The diagram shown below is a theoretical representation of the phase diagram for carbon. The hatched regions indicate conditions under which the phase is predicted to be metastable in effect this means that multiple phases can co-exist in these regions. Using this diagram, answer the following questions concerning the phases of carbon. Note the indicated scales for the horizontal and vertical axes (1 bar = 0.0001 GPa). 1000- 100- p/GPa 10- 0.1 0.01- 0.001+ 0 diamond graphite 1 2 3 4 liquid vapor 5 6 7 T/1000 K 8 9 10 (a) Does graphite melt or sublime at 10 bars of pressure? (b) If pressure remains constant, what are the possible phase transitions for diamond at 4500 K as T is increased? (c) Identify the approximate temperature and pressure of the standard solid-liquid-gas triple point on this diagram. Are there other triple points indicated in the diagram? (d) Estimate the maximum temperature at which graphite can exist at P = 1 GPa. What would happen if the pressure is increased for a…1.At -185°C and 1 atm ethane (MW = 30.07 g/mol) exists as a solid with a FCC structure. Using the data provided below: E/k=194.1K, bo=0.1794 m3/kmol Determine the diameter of one molecule of ethane (in angstroms). 2. What is the void fraction? 3. Find the density of the solid etahne. 4. Calculate the distance of separation (in m) between two ethane molecules when the potential energy is at a minimum. 5. At the separation distance calculated in part (4), determine the minimum value of the potential energy between two molecules (in J).Why would industry prefer to purify solids by sublimation or zone refining rather than recrystallization? (Hint: is there anything wasteful about recrystallization)