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One of the most common chemical reactors found around us is the car engine. It takes gasoline and reacts it with air to release chemical energy, which in turn is transformed into mechanical energy. Emissions from your car's engine have been an environmental concern for many years.
Using the concepts of material balances, determine how much (in moles and lbs) air is needed and CO2, N2, CO, and H2O are emitted for every gallon of gasoline burned in your car's engine. Assume that gasoline, a mixture of many hydrocarbons, can be modeled as pure octane (C8H18). Assume that 90% of the octane is turned into carbon dioxide and water, and 10% of the octane is turned into carbon monoxide and water. No excess air is involved in the reaction, meaning only enough air to provide the needed oxygen is introduced into the engine. Also assume the nitrogen in the air does not react at the temperature of your engine. Use the variables nO2, nN2, nCO, nCO2, nN2, and nH2O to represent the number of moles of each component in various streams.
A sinusoidal signal, with amplitude of 3.25 volts, is applied to a uniform quantizer of the mid-tread type whose output takes on the values 0, ±1, ±2, ±3 volts. Sketch the waveform of the resulting quantizer output for one complete cycle of the in..
adsorption and membrane processeszeolites are used to adsorb a wide range of solutes from vapour and gas streams. what
Figure shows an x-ray diffraction pattern for a-iron taken using a diffract meter and monochromatic x-radiation having a wavelength of 0.1542 nm; each diffraction peak on the pattern has been indexed.
Implications of the future of fabrication for international trade, transportation, and logistics
An electron falls from the conduction band of silicon (Si) to the valence band. The band gap of Si is 1.1 eV. What is the wavelength of the photon emitted by this process? Give your answer in nm
Large blooms of algae result from high nutrient loading in rivers and lakes, for example, as a result of runoff of fertilizers from agricultural fields.
Need to make 250 ml of a 0.100 M solution of aluminum from a 5M stock of aluminum nitrate. What do you do?
Figure shows the tensile engineering stress-strain behavior for a steel alloy. (a) What is the modulus of elasticity?
What is the settling velocity in still air of a particle that is 40 µm in diameter and spherical? The particle has a density of 1400 Kg/m3. Use a density of 1.2 Kg/m3 and a viscosity
The process used in the manufacture of aniline from nitrobenzene is described in Appendix F, Design Problem F.8, which is available in the online material at booksite.Elsevier.com/Towler. The process involves six significant stages:
A 0.250-g sample of citric acid dissolved in 25.0 mL of water requires 37.2 mL of 0.105 M NaOH for complete neutralization. What number of acidic hydrogens per molecule does citric acid have?
What results can be expected in the near-term? The mid-term? The long-term? Nanotech's development can usefully be divided into stages, for example:
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