The BOD, of a local river is 140mg/L The reaction rate and temperature are Ka 0.03d and 23°C respectfully. Find the BOD, of the river.
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- A water has a Total Dissolved Solids Concentration (TDS) of 250 mg/L. Estimate the equilibrium constant for the following reaction under these conditions: A+2 + B-3 <---> AB- l Log Keq = 10.2 @ I = 0 I = Ionic Strength11-13 The Cu-Za phase diagram is shown in Figure 11-27. (a) Are any intermetallic compounds pres- ent? If so, identify them and determine whether they are stoichiometric or nonstoichiometric. (b) Identify the solid solutions present in the system. (c) Identify the three-phase reactions by writing down the temperature, the reaction in equation form, and the name of the reaction. 1100 1000- 90아 800 70아 600- 500 400- 300 200 10아 Cu 10 20 30 40 50 60 70 80 90 Zn Temperature ("C)H.W3: Predict the ideal solubility of lead in bismuth at 280°C given that its melting point is 327°C and its enthalpy of fusion is 5.2 kJ mol-1, M.wt Bi=209 g/mol, M.wt Pb=209 g/mol.
- docs.google.com 8 gel pores and capillaries decrease with the progress of 5 points cement hydration True False Other:26) Given the T-T-T curve below, select the process that will result in a microstructure of nearly all bainite. a. Cool to 400°C, hold for 20 seconds, then quench to room temperature b. Cool to 500°C, hold for 10 seconds, then quench to room temperature c. Quench to 125°C, hold for 10 seconds, then reheat to 600°C for more than 100 seconds d. Cool to 725°C, hold for 1,000 seconds, then quench to 125°C e. Cool to 600°C, hold for 1 second, the quench to room temperature Temperature (°C) f. none of the above 900 800 H A+C 1600 1400 700- 1200 A+P 600 P 1000 500H A+B 800 400- Temperature (°F) 4 A 300- M(start) 200 M(50%) 100- M(90%) 600 50% T 0 1 10 102 103 10 105 106 Time (s) 400 200 27) Fatigue failure situations are typically dependent upon which combination of the following factors? a. Slip plane, slip direction, and orientation of the applied load b. Yield strength, elastic modulus, and ductility of the material c. Temperature, time, and applied stress d. Stress amplitude, frequency of…Two parts!
- 26) Given the T-T-T curve below, select the process that will result in a microstructure of nearly all bainite. C. Cool to 400°C, hold for 20 seconds, then quench to room temperature Cool to 500°C, hold for 10 seconds, then quench to room temperature Quench to 125°C, hold for 10 seconds, then reheat to 600°C for more than 100 seconds d. Cool to 725°C, hold for 1,000 seconds, then quench to 125°C Cool to 600°C, hold for 1 second, the quench to room temperature f. none of the above 900 Temperature (°C) 800 A+C 700 A+P 600 500 A+B 400 A 300 200 M(start) M(50%) 100 M(90%) TT 1600 1400 1200 1000 800 600 50% 0 1 10 102 103 104 105 106 Time(s) 400 200 Temperature (°F) 27) Fatigue failure situations are typically dependent upon which combination of the following factors? Slip plane, slip direction, and orientation of the applied load b. Yield strength, elastic modulus, and ductility of the material c. Temperature, time, and applied stress d. Stress amplitude, frequency of loading, and number…Choose the correct answer C3S has a faster rate of reaction accompanied by low heat generation. A-True B-FalseThe reactions are?
- 2. At temperature of 20C, the BOD, was determined to be 180 mg/L 0₂. At 20 C, the reaction rate (constant) is k₂0 = 0.2 d-¹ Find the following: a. BOD ult b. Reaction rate k₁, (at temperature of 15C c. BOD, at temperature of 15C2. In a copper-nickel system as shown in figure, an alloy composition of 35 wt% Ni was cooled down from the temperature of 1300°C. Sketch the expected microstructures at the point a, b, c, d and e and briefly describe the development of these microstructures in the equilibrium cooling. L. L (35 Ni) 1300 L (32 Ni) a (46 Ni) a(43 Ni) L (24 Ni) d 1200 1100 20 30 40 50 Composition (wt% Ni) Temperature (°C))The equilibrium constant for the reaction below is 1.8 x 1019 at 298K. What is the value of the standard cell potential for this reaction? Nij + Hg²CI?«) 2Hg) + 2Cl (aq) + Ni2+, (aq) Determine the cell potential for this reaction. O 0.57 J/C O 1.02 J/C O 0.24 J/C