Issue 1 Iron(III) oxide reacts with carbon monoxide to produce elemental iron and carbon dioxide. Determine the enthalpy change for this reaction using known enthalpies of formation. Fe2O3(s) + 3 CO(g) → 3 CO2(g) + 2 Fe(s)

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Issue 1
Iron(III) oxide reacts with carbon monoxide to produce elemental iron and carbon dioxide. Determine the enthalpy change for this reaction using known enthalpies of formation.

Fe2O3(s) + 3 CO(g) → 3 CO2(g) + 2 Fe(s)

 

Issue 2
Tetraphosphorus decaoxide, P4O10, is an acidic oxide. It reacts with water to produce phosphoric acid, H3PO4, in an exothermic reaction.

P4O10(s) + 6 H2O(l) → 4 H3PO4(aq) ΔHorxn = -257.2 kJ

a) Rewrite the thermochemical equation to include the enthalpy change as a term in the equation.

b) How much energy is released from the reaction of 5.00 mol of P4O10 with excess water?

 

Issue 4
Find, using Hess's law, the overall enthalpy change of the reaction below. Determine whether the reaction is endothermic or exothermic.

2N2 + 5O2 → 2N2O5

Refer to the following reactions.

1) 2H2O → O2 + 2H2 ∆H= +572 kJ

2) N2O5 + H2O → 2HNO3 ∆H= -78 kJ

3) N2 + 3O2 + H2 → 2HNO3 ∆H= -349 kJ

 

Issue 5
The data in the table below was compiled for the following reaction.

A + B → C + D

At temperature T, the following initial velocity data was obtained.

Experience

[A] (mol/L)

[B] (mol/L)

Initial speed (mol/L s)

1

0,020

0,020

5,0 x 10-3

2

0,040

0,020

1,0 x 10-2

3

0,040

0,060

4,5 x 10-2

Determine the rate law equation and the rate constant at temperature T with the appropriate units.

 

 

 
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