Question

Consider the following reaction, which is involved in the purification of iron from its ores. Some...

Consider the following reaction, which is involved in the purification of iron from its ores. Some relevant thermodynamic data is shown below.

Fe2O3 (s) + 3CO(g) → 2Fe(s) + 3 CO2 (g) ΔS° = 15.2 J/K

Substance ∆Hf° (kJ/mol) S° (J/K/mol) ∆Gf° (kJ/mol)
Fe2O3(s) –824.2 87.40 ??
CO(g) –110.5 197.6 –137.2
Fe(s) 0 ?? 0
CO2(g) –393.5 213.6 –394.4

a) Find ΔH° for the reaction above.

b) Find S° for solid iron.

c) Find ∆Gf° for Fe2O3.

*** I know the answers, I just need help on the steps. ***

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

a)

dH= Hprod - Hreact

dH = (2*0 + 3*-393.5) - (-824.2 + 3*-110.5)= -24.8 kJ

b)

dS = Sprod - Sreact

dS = 2*S-Fe + 3*S-CO2 - (S-Fe2O3 + 3*S-CO)

15.2 = 2*S-Fe + 3*213.6 - (87.4 + 3*197.6)

S-Fe = ((15.2) - (3*213.6 - (87.4 + 3*197.6) ))/2

S-Fe = 27.3 J/molK

c)

dG for Fe2O3

so

dG = dGprod - dGreact

dG = dH - T+dS = (-24800) - 298*(15.2) = -29329.6 J/mol = -29.32 kJ/mol

so

-29.32 = 2*0 + 3*-394.4 - (G-Fe2O3 + 3*-1372.)

-29.32 + 3*394.4 -3*(137.2) = dG-Fe2O3

dG - Fe2O3 = -742.28 kJ/mol

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Calculate the enthalpy of reaction for the following reaction: Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g)...
Calculate the enthalpy of reaction for the following reaction: Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g) ΔHfo(Fe2O3(s)) = -824.2 kJ/mol ΔHfo(CO(g)) = -110.5 ΔHfo(Fe(s)) = ? ΔHfo(CO2(g)) = -393.5 kJ/mol
Calculate ΔHrxn for the following reaction: Fe2O3(s)+3CO(g)→2Fe(s)+3CO2(g) Use the following reactions and given ΔH′s. 2Fe(s)+3/2O2(g)→Fe2O3(s), ΔH...
Calculate ΔHrxn for the following reaction: Fe2O3(s)+3CO(g)→2Fe(s)+3CO2(g) Use the following reactions and given ΔH′s. 2Fe(s)+3/2O2(g)→Fe2O3(s), ΔH = -824.2 kJ CO(g)+1/2O2(g)→CO2(g), ΔH = -282.7 kJ
What is ΔGo (in kJ) at 464 K for the following reaction? PbO(g) + CO2(g) →...
What is ΔGo (in kJ) at 464 K for the following reaction? PbO(g) + CO2(g) → PbCO3(s) PbO: ΔHfo = -219.0 kJ/mol and So = 66.5 J/K mol) PbCO3(s): ΔHfo = -699.1 kJ/mol and So = 131.0 J/K mol) CO2: ΔHfo = -393.5 kJ/mol and So = 213.6 J/K mol)
Calculate ΔG∘ (in kJ/mol) for the following reaction at 1 atm and 25 °C: C2H6 (g)...
Calculate ΔG∘ (in kJ/mol) for the following reaction at 1 atm and 25 °C: C2H6 (g) + O2 (g)  → CO2 (g) + H2O (l) (unbalanced) ΔHf C2H6 (g) = -84.7 kJ/mol; S C2H6 (g) = 229.5 J/K⋅mol; ΔHf ∘ CO2 (g) = -393.5 kJ/mol; S CO2 (g) = 213.6 J/K⋅mol; ΔHf H2O (l) = -285.8 kJ/mol; SH2O (l) = 69.9 J/K⋅mol; SO2 (g) = 205.0 J/K⋅mol
The water gas shift reaction is used commercially to produce H2(g): CO(g)+H2O(g)⇌CO2(g)+H2(g). Use the following data...
The water gas shift reaction is used commercially to produce H2(g): CO(g)+H2O(g)⇌CO2(g)+H2(g). Use the following data to determine: ΔfH∘[CO2(g)] = -393.5 kJ/mol ΔfH∘[H2(g)] = 0 kJ/mol ΔfH∘[CO(g)] = -110.5 kJ/mol ΔfH∘[H2O(g)] = -241.8 kJ/mol ΔS∘[CO2(g)] = -393.5 Jmol−1K−1 ΔS∘[H2(g)] = -393.5 Jmol−1K−1 ΔS∘[CO(g)] = -393.5 Jmol−1K−1 ΔS∘[H2O(g)] = -393.5 Jmol−1K−1 a. ΔrH∘ at 298 K. b. ΔrS∘ at 298 K. c. ΔrG∘ at 298 K. d. K at 650 K .
a) What is ΔGrxno (in kJ) at 2715 K for the following reaction? 2POCl3(g) → 2PCl3(g)...
a) What is ΔGrxno (in kJ) at 2715 K for the following reaction? 2POCl3(g) → 2PCl3(g) + O2(g) POCl3(g): ΔHfo = -592.7 kJ/mol and Sº = 324.6 J/K mol) PCl3(g): ΔHfo = -287.0 kJ/mol and Sº = 311.7 J/K mol) O2(g): ΔHfo = ? kJ/mol and Sº = 205.0 J/K mol) b) At what temperature (IN KELVIN) does the above reaction become spontaneous? c) What is ΔGrxno (in kJ) at 488 K for the following reaction? PbO(g) + CO2(g) →...
The reaction of iron(III) oxide with carbon monoxide is important in making steel. At 1000 K,...
The reaction of iron(III) oxide with carbon monoxide is important in making steel. At 1000 K, Kp=19.9 for the reaction Fe2O3(s) + 3CO(g) <-----> 2Fe(s) + 3CO2(g). What are the equilibrium partial pressures of CO and CO2 if CO is the only gas present initially, at a partial pressure of 0.978 atm?
The reaction of iron(III) oxide with carbon monoxide is important in making steel. At 1200 K,...
The reaction of iron(III) oxide with carbon monoxide is important in making steel. At 1200 K, Kp=19.9 for the following reaction: Fe2O3(s)+3CO(g)⇌2Fe(l)+3CO2(g) What are the equilibrium partial pressures of CO and CO2 if CO is the only gas present initially, at a partial pressure of 0.908 atm? Express your answers in atmospheres to three significant figures separated by a comma.
Given the following reactions: Question (1) Calculate for the change in enthalpy of the reaction of...
Given the following reactions: Question (1) Calculate for the change in enthalpy of the reaction of (3Fe2O3(s) + CO(g) yields CO2(g) + 2Fe3O4(s)) Fe2O3(s) + 3CO(g) yields 2Fe(s) + 3CO2(s)(Change in enthalpy= -28.0 kJ) 3Fe(s) + 4CO2(s) yields 4CO(g) + FE3O4(s) (Change in enthalpy= +12.5 kJ)
3)From the following data at 25C ∆Hreaction (kJ mol-1) Fe2O3(s) + 3C(graphite) → 2Fe(s) + 3CO(g)...
3)From the following data at 25C ∆Hreaction (kJ mol-1) Fe2O3(s) + 3C(graphite) → 2Fe(s) + 3CO(g) 492.6 FeO(s) + C(graphite) → Fe(s) + CO(g) 155.8 C(graphite) + O2(g) → CO2(g) -393.51 CO(g) + 1⁄2 O2(g) → CO2(g) -282.98 Calculate the standard enthalpy of formation of FeO(s) and of Fe2O3(s).
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT