a. Give three properties of a bulk material that change significantly when you have a nanoparticle of the same material. State in what way the properties will change.
b. Sketch the unit cell for a faced-centered-cubic metal crystal (FCC), and sketch the unit cell for a body-centered-cubic metal crystal (BCC)
c. Sketch the arrangement of atoms in a {111} facet and then in a {100} facet on the surface of a nanoparticle.
d. Explain briefly how to force a nanocube to form instead of a nanosphere
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A German fuel blend called Reichkraftskoff is made up of 50% motor benzole (75% benzene, 15% toluene, 10% xylene), 25% tetralin (C10H12) and 25% industrial alcohol (80% ethanol, 20% methanol). After combustion in excess air, a stack gas containing 9.13%CO2 and 1.83%CO is obtained. Calculate a) % excess air; b) Complete Orsat analysis of the stack gas.
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Coal tar fuels are liquid obtained by blending coal tar distillation products such as carbolic oil, naphthalene oil, creosote oil, anthracene oil and medium pitch. A sample of elemental analysis shows 85.9% C, 6.3% H, 1.2%S, 5.5% O and 1.1%N. If this fuel is burned in excess air at 30℃ and 755 mmHg with 90% RH, it produces a burner gas containing 10.64% CO2, 3.19% CO and 0.64%H2. Assuming negligible N and S. Calculate a) %excess air; b) Complete Orsat analysis of the burner gas; c) m3 stack gas.
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define/describe the basic chemical manufacturing industry.
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Biodiesel from a palm oil has an approximate formula of CxHyOz. Excess air is supplied at 30℃, 100kPa and 85%RH. The exhaust gas leaves at 250℃ and 750mmHg with a complete analysis of 12.08%CO2, 0.25%CO, 0.55%H2, 2.12%O2, 71.17%N2 and the rest is H2O. Find the formula of biodiesel.
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What are the main sources of alternative, or renewable, energy?
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100 g of nitrogen gas reacts with hydrogen gas to produce 40g of ammonia gas according to the equation given below:
N2(g) + 3H2(g) ⇋ 2NH3(g)
Calculate the percentage yield of ammonia
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Sodium hydroxide is made by the electrolysis of brine solution. The overall reaction may be written as:
2NaCl + 2H2O à 2NaOH + H2 + Cl2
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The gas phase reaction 2A + B →2C
is carried out isothermally and isobarically. The reaction is first order in A and first order in B. The feed is equal molar in A and B and the entering concentration of A is 0.5 mol/dm3. The specific reaction rate is k = 4.0 dm3/mol s.
Write the rate of reaction, –rA, solely as a function of conversion, evaluating all parameters.
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Ammonia reacts with sulphuric acid giving ammonium sulphate 2NH3 + H2SO4 à (NH4)2SO4 20 m3 of ammonia at 1.2 bar and 300 K reacts with 40 kg of sulphuric acid. Determine the excess reactant and Calculate the theoretical yield. |
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100 g of nitrogen gas reacts with hydrogen gas to produce 40g of ammonia gas according to the equation given below:
N2(g) + 3H2(g) ⇋ 2NH3(g)
Calculate the percentage yield of ammonia
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Sodium hydroxide is made by the electrolysis of brine solution. The overall reaction may be written as:
2NaCl + 2H2O à 2NaOH + H2 + Cl2
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A solution of potassium chloride in water contains 384 g KCl per liter of the solution. The specific gravity of the solution is 1.6. Determine the following:
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100 litres each of gasoline (55°API), kerosene (40°API), gas oil (31°API), and isopentane (96 °API ) are mixed. The density of water at 288.5 K = 0.999 g/mL.
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