Phosphorus is prepared by heating in the electric furnace a thoroughly mixed mass of calcium phosphate, sand and charcoal. It may be assumed that in a certain charge the following conditions exist: the amount of silica used is 10% in excess of that theoretically required to combine with the calcium to form the silicate; the charcoal is 40% in excess of that required to combine, as carbon monoxide, with the O2 that would accompany all the phosphorus as the pentoxide. Calculate: (a) the % composition of the original charge (b) the kg of P obtained per 100 kg of charge, assuming that the decomposition of 
the phosphate by the silica is 90% complete and that the reduction of the liberated oxide of 
P, by the carbon, is 70% complete.

Q: 5. Cite the (1) phases that are present and (2) the phase compositions for the following alloys.…

A: a) 90wt% Zn - 10wt% Cu at 400ocb) 2.12Kg Zn and 1.88 Kg Cu at 500oc

Q: Compare the standard heat of combustion at 6 moles of CH3OH(g) at 25 C with the standard heat of…

A: The combustion reaction of CH3OH is as follows:

Q: A solution is made by dissolving 0.501 mol of nonelectrolyte solute in 797 g of benzene. Calculate…

A:

Q: 1. A lead-tin alloy of composition 30 wt% Sn-70 wt% Pb is slowly heated from a temperature of 150…

A:

Q: Carborundum is silicon carbide, SiC, a very hard material used as an abrasive on sandpaper and in…

A:

Q: Iron can react with oxygen to give iron (iii) oxide. If 5.58 g of Fe is heated in pure oxygen to…

A:

Q: A mixture containing 60 mol% benzene and 40 mol% toluene is subjected to differential distillation…

A: It is supposed that, Basis =100 mol feed Hence, in original feed, moles of benzene (60%) noa = 60…

Q: A combustible gas has an LOC of 9 vol% oxygen in a mixture of the gas with air. Stoichiometrically,…

A: The lowest concentration of a flammable gas in air, below which the combination is too "lean" to…

Q: The heat of formation for gaseous chlorine atoms is + 121.7 kJ. Cl218) > 2 Clg) ---- --- Which of…

A: Given: Cl2g→2Clg Heat of reaction=121.7kJ

Q: The intrinsic viscosity of a sample of poly(methyl methacrylate) is 22.04 cm3g-1 in toluene at 25°C…

A: Given Intrinsic viscosity of a sample of poly(methyl methacrylate),η= 22.04 cm3g-1 in toluene at…

Q: What amount of energy must be removed to cool 3.00 moles of liquid ethanol at 35°C to -55°C?

A: moles of ethanol n = 3 T1 = 35 oC = 308 K T2 = -55 oC = 218 K

Q: Adding nitric acid to water is quite exothermic. If the AHsoln of HNO3 is -33.3 kJ/mol, then how…

A:

Q: EXAMPLE: Use the heat of solution data in Appendix I to determine the heat transferred per mole of…

A:

Q: 2. At 25°C the surface tension of benzene is 28.9 mN/m and its molar volume is 89.2 cm³/mol.…

A: Given Data :At 25 degree C the surface tension of benzene is  Molar volume of benzene((Vm)) is  -…

Q: An adiabatic compressor with 65% efficiency is fed with 25kg/sec of saturated steam at 200kPa. The…

A: Given information:   Adiabatic compressor Inlet pressure, P1 = 200 kPa Outlet pressure, P2 = 1000…

Hazard Analysis and Design in Chemical Engineering

Hazard is the intrinsic property of a material or process which harms the people, buildings, or environment. Health, safety, hazard, risk assessment, loss prevention, and environmental consideration play an important role while designing a chemical processing plant. Hazard is often confused with risk. Risk measures the magnitude of loss and injury of likelihood incidents or the consequence and frequency of incidents.