Question

H2O(g) + Cl2(g) 2 HCl(g) + ½ O2(g)

Heat of Reaction is WebAssign will check your answer for the correct number of significant figures.
kJ

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Information:
COCl2(g) + H2O(g) CH2Cl2(l) + O2(g) DeltaH = 16 kJ

HCl(g) ½ H2(g) + ½ Cl2(g) Delta H = 92 kJ

CH2Cl2(l) + H2(g) + 3/2 O2(g) COCl2(g) + 2 H2O(g) DeltaH = -167 kJ

use hess's law

Answer 1

I suggest you submit a question along with the appropriate information in standard form. I don't see a question here.