Use standard enthalpies of formation to calculate ? H ? r x n for the following

Question

            Use standard enthalpies of formation to calculate ?H?rxn  for the following reaction.
C(s)+H2O(g)?CO(g)+H2(g) Express your answer using four significant figures.

Use standard enthalpies of formation to calculate ?H?rxn  for the following reaction.
CH4(g)+2O2(g)?CO2(g)+2H2O(g)

C(s)+H2O(g)?CO(g)+H2(g)
            Use standard enthalpies of formation to calculate ?H?rxn  for the following reaction.
C(s)+H2O(g)?CO(g)+H2(g) Express your answer using four significant figures.

Use standard enthalpies of formation to calculate ?H?rxn  for the following reaction.
CH4(g)+2O2(g)?CO2(g)+2H2O(g)

C(s)+H2O(g)?CO(g)+H2(g)

Explanation / Answer

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CH4(g)+2O2(g)?CO2(g)+2H2O(g)

Standard enthalpy of formation of

CH4(g)=-74.9 kJ/mol

H2O(g)=-241.88 kJ/mol

CO2(g)=-393.509 kJ/mol

O2(g)=0

deltaH rxn= deltaHf(CO2) + deltaHf(H20) - deltaHf(02) - deltaHf(CH4)

=-393.509- 241.88 +74.9

Enthalpy of reaction=-560.489 kJ

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