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2. 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 Bthe phosphate by the silica is 90% complete and that the reduction of the liberated oxide of RP, by the carbon, is 70% complete.

2. 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 Bthe phosphate by the silica is 90% complete and that the reduction of the liberated oxide of RP, by the carbon, is 70% complete.

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
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2. 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 O, 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 Rthe phosphate by the silica is 90% complete and that the reduction of the liberated oxide of RP, by the carbon, is 70% complete.
Transcribed Image Text:2. 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 O, 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 Rthe phosphate by the silica is 90% complete and that the reduction of the liberated oxide of RP, by the carbon, is 70% complete.
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