Calculating DH°rxn?

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What is DH°rxn for the following reaction, CH4(g) + 2 O2(g) ---> CO2(g) + 2 H2O(l), given
DH°f[CH4(g)] = -74.8 kJ; ...DH°f[CO2(g)] = -393.5 kJ; ...DH°f[H2O(l)] = -285.5 kJ.


a. ) -604.2 kJ
b. ) 869.7 kJ
c. ) -997.7 kJ
d. ) -889.7 kJ
e. ) 997.7

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