Chemistry, 29.06.2019 04:00 Maaarii

The reduction of iron(iii) oxide (fe2o3) to pure iron during the first step of steelmaking, 2fe2o3(s)→ 4fe(s)+ 3o2(g) is driven by the high-temperature combustion of coke, a purified form of coal: c(s)+ o2(g)→ co2(g) suppose at the temperature of a blast furnace the gibbs free energies of formation δgf of co2 and fe2o3 are −429./kjmol and −835./kjmol, respectively. calculate the minimum mass of coke needed to produce 6400.kg of pure iron. round your answer to 2 significant digits.

Answers: 1

Show answers

Answers

Answer from: svarner2001

1031.33 kg of coke will produce 6400 kg of iron.

Explanation:

$2Fe_2O_3(s)\rightarrow 4Fe(s)+3O_2(g),\Delta G_{f}=-835kJ/mol$ ...(1)

$C(s)+O_2\rightarrow CO_2(g),\Delta G_{f}=-429kJ/mol$ ...(2)

(1)+3 × (2)

$2Fe_2O_3(s)+3C(s)\rightarrow 4Fe(s)+3CO_2(g),\Delta G_f=-1700kJ/mol$ ...(3)

$\Delta G_f=-835+3\times (-429)=-1700kJ/mol$

Mass of iron = 6400 kg = 6,400,000 g(1 kg = 1000 g)

Moles of iron = $\frac{\text{mass of the iron}}{\text{Molar mass of the iron}}=\frac{6,400,000 g}{55.85 g/mol}= 114,592.65 moles$

According to reaction (3) , 4 moles of iron are produced from 3 moles of coke(C(s)) ,then 114,592.65 moles of iron will be produced from = $\frac{3}{4}\times 114,592.65$ moles of coke.

Mass of coke:

$\text{Mass of coke}=\text{Number of moles of coke}\times \text{Molar mass of carbon}=\frac{3}{4}\times 114,592.65 mol\times 12 g/mol=1,031,333.93 g=1031.33 kg$

Hence, 1031.33 kg of coke will produce 6400 kg of iron.

Answer from: Quest

wanahton purified a portion of water with 900 grams of contaminants. each hour, a third of the contaminants was filtered out.

let g(n) be the amount of contaminants (in grams) that remained by the beginning of the nth hour. g is a sequence, what kind of sequence is it, arithmetic or geometric? then, write an explicit formula for the sequence, g(n)=

wanahton purified a portion of water with 900 grams of contaminants. each hour, a third of the contaminants was filtered out.

explanation:

Answer from: Quest

what is the volume occupied by 40 grams of argon gas (ar) at standard conditions? what volume, in liters, is occupied by 1.5 x 1023

Another question on Chemistry

Chemistry, 22.06.2019 07:10

Remember to use the proper number of significant figures and leading zeros in all calculations.gelatin has a density of 1.27 g/cm³. if you have a blob of gelatin dessert that fills a 2.0 liter bottle, what is its mass? 2540 g2500 g3.9 x 10-43.937x 10-4

Answers: 3

Answer

Chemistry, 22.06.2019 07:10

An experimental procedure requires a 10 ml of acid to be dissolved

Answers: 2

Answer

Chemistry, 22.06.2019 10:00

Why is the structure of molecule important to its function?

Answers: 1

Answer

Chemistry, 23.06.2019 10:30

Fill in the blanks for the following statements: the rms speed of the molecules in a sample of h2 gas at 300 k will be times larger than the rms speed of o2 molecules at the same temperature, and the ratio µrms (h2) / µrms (o2) with increasing temperature. a not enough information is given to answer this question b sixteen, will not change c four, will not change d four, will increase e sixteen, will decrease

Answers: 2

Answer

You know the right answer?

The reduction of iron(iii) oxide (fe2o3) to pure iron during the first step of steelmaking, 2fe2o3(s...

Questions