Click on the button within the activity and use the example shown to calculate the reaction enthalpy, HH, for the following reaction:

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

Use the series of reactions that follow:

C(s)+2H2(g)CH4(g)C(s)+2H2(g)CH4(g), HH =74.8=74.8 kJ mol1

C(s)+O2(g)CO2(g)C(s)+O2(g)CO2(g), HH =393.5=393.5 kJ mol1

2H2(g)+O2(g)2H2O(g)2H2(g)+O2(g)2H2O(g), HH =484.0=484.0 kJ mol1

H2O(l)H2O(g)H2O(l)H2O(g), HH =44.0=44.0 kJ mol1

Express your answer with appropriate units.

my answer has been -890.7 kJ. which doesnt seem to be right