The thermochemical equation for the combustion of propane is shown below: C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(liq) ΔrH° = -2220 kJ/mol-rxn What is the enthalpy change for the following reaction? 9 CO2(g) + 12 H2O(liq) → 3 C3H8(g) + 15 O2(g) a) -6600 kJ b) -8880 kJ c) +6660 kJ d) +8880 kJ e) +4440 kJ

Chemistry by OpenStax (2015-05-04)
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Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
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Chapter5: Thermochemistry
Section: Chapter Questions
Problem 69E: Using the data in Appendix G, calculate the standard enthalpy change for each of the following...
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The thermochemical equation for the combustion of propane is shown below:

            C3H8(g)  +  5 O2(g)  →  3 CO2(g)  +  4 H2O(liq)       Δr = -2220 kJ/mol-rxn

What is the enthalpy change for the following reaction?

9 CO2(g)  +  12 H2O(liq)  →  3 C3H8(g)  +  15 O2(g)

 

a) -6600 kJ

b) -8880 kJ

c) +6660 kJ          

d) +8880 kJ          

e) +4440 kJ

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