GEN COMBO CHEMISTRY: ATOMS FIRST; ALEKS 360 2S ACCESS CARD CHEMISTRY:ATOMS FIRST
GEN COMBO CHEMISTRY: ATOMS FIRST; ALEKS 360 2S ACCESS CARD CHEMISTRY:ATOMS FIRST
3rd Edition
ISBN: 9781260020229
Author: Julia Burdge
Publisher: McGraw-Hill Education
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Chapter 26, Problem 26.63QP

(a)

Interpretation Introduction

Interpretation:

The ΔG for the given reaction at 25C has to be calculated.

Concept introduction:

To calculate ΔG values for the given reaction we have to use the following formula

ΔGrxn=ΔGf(products)ΔGf(substrates)

(a)

Expert Solution
Check Mark

Answer to Problem 26.63QP

The ΔG for the given reactions at 25C is 1482 kJ/mol

Explanation of Solution

Record the given data.

Reactions:

2Fe2O3(s)4Fe(s)+ 3O2(g)

The temperature of the reaction is 25C

ΔGf(Fe2O3)=-741.0kJ/mol

The given equations, temperature and Gibbs free energies of the given iron oxide and aluminum oxides were recorded as above.

To calculate ΔG for 2Fe2O3(s)4Fe(s)+ 3O2(g)

Substitute the corresponding values in the above formula we can get answer as follows.

ΔGrxn=4ΔGf(Fe)+3ΔGf(O2)2ΔGf(Fe2O3)

ΔGrxn=4(0)+3(0)(2)(-741.0 kJ/mol) = 1482 kJ/mol

Conclusion

The ΔG for the given reaction at 25C is 1482 kJ/mol

(b)

Interpretation Introduction

Interpretation:

The ΔG for the given reaction at 25C has to be calculated.

Concept introduction:

To calculate ΔG values for the given reaction we have to use the following formula

ΔGrxn=ΔGf(products)ΔGf(substrates)

(b)

Expert Solution
Check Mark

Answer to Problem 26.63QP

The ΔG for the given reaction at 25C is 3152.8 kJ/mol

Explanation of Solution

Record the given data.

Reactions:

2Al2O34Al(s)+ 3O2(g)

The temperature of the reaction is 25C

ΔGf(Al2O3)=-1576.4kJ/mol

The given equations, temperature and Gibbs free energies of the given iron oxide and aluminum oxides were recorded as above.

To calculate ΔG for 2Al2O34Al(s)+ 3O2(g)

Substitute the corresponding values in the above formula we can get answer as follows.

ΔGrxn=4ΔGf(Al)+3ΔGf(O2)2ΔGf(Al2O3)

ΔGrxn=4(0)+3(0)(2)(-1576.4 kJ/mol) = 3152.8 kJ/mol

Conclusion

The ΔG for the given reaction at 25C is 3152.8 kJ/mol

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Chapter 26 Solutions

GEN COMBO CHEMISTRY: ATOMS FIRST; ALEKS 360 2S ACCESS CARD CHEMISTRY:ATOMS FIRST

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