The combustion of methane can be represented as follows:

a. Use the information given above to determine the value of ΔH for the combustion of methane to form CO2(g) and 2H2O(l).
b. What is ΔHof for an element in its standard state? Why is this? Use the figure above to support your answer.
c. How does ΔH for the reaction CO2(g) + 2H2O(l) †’ CH4(g) + O2(g) compare to that of the combustion of methane? Why is this?

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Reactants Elements Products Step 1 Step 2 Go AR-572