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Natural uranium is mostly nonfissionable 238U; it contains only about 0.7% of fissionable 235U. For uranium to be useful as a nuclear fuel, the relative amount of 235U must be increased to about 3%. This is accomplished through a gas diffusion process. In the diffusion process, natural uranium reacts with fluorine to form a mixture of 238UF6(g) and 235UF6(g). The fluoride mixture is then enriched through a multistage diffusion process to produce a 3% 235U nuclear fuel. The diffusion process utilizes Graham's law of effusion (see Chapter 5, Section 5.7). Explain how Graham's law of effusion allows natural uranium to be enriched by the gaseous diffusion process.
Adsorption and Membrane Processes
What are the units commonly used in occupational exposure limits for quantifying the concentration of dust particles, vapours or gases and fibres? What does LD 50 mean in Industrial Toxicology
Select a process variable (pressure / temperature / level / flow) and conduct a literature survey to determine recent developments in process instrumentation field. Identify any one novel instrument and explain in detail the working of the instr..
The heat capacity at constant pressure of hydrogen cyanide is given by the expression Cp[J/(mol ·°C)] = 35.3 + 0.0291T(°C) (a) Write an expression for the heat capacity at constant volume for HCN, assuming ideal gas behavior.
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the rate of flow to an ammonia synthesis reactor contains 25 mole ltbrgtnitrogen and the balance hydrogen. the flow
Use the Gibbs phase rule to determine how many degrees of freedom exist for the system at equilibrium. State the meaning of your result in your own words.
What are the attractive characteristics of Green Fuels and Chemicals and comment on the impact of either fossil fuels or biodiesel on mangrove forests.
Given the following experimentally determined standard molar entropies at 298.15 K and 1 bar, S [CH3OH]=126.8 J⋅K-1⋅mol-1 S°[CO]=197.7 J⋅K-1⋅mol-1
What is the net energy balance ratio for the production of biodiesel from soy. You are replacing a 75 W light bulb in your home that operates, on average, 6 hours per day. You can select from the three light bulbs shown in the table below. Note th..
A mixture contains only NaCl and Fe(NO3)3. A 0.456-g sample of the mixture is dissolved in water, and an excess of NaOH is added, producing a precipitate of Fe(OH)3. The precipitate is filtered, dried, and weighed. Its mass is 0.107 g.
Acetylene (C2H2) and butane (C4H10) are gaseous fuels with enthalpies of combustion of 49.9 kJ/g and 49.5 kJ/g, respectively. Compare the energy available from the combustion of a given volume of acetylene to the combustion energy from the same ..
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