What is the change in H?

Question

Calculate the enthalpy change for the reaction shown below.
BrCl(g) Br(g) + Cl(g) H = ?

Use the following data.
Br2(l) Br2(g) H = 30.91 kJ
Br2(g) 2 Br(g) H = 192.9 kJ
Cl2(g) 2 Cl(g) H = 243.4 kJ
Br2(l) + Cl2(g) 2 BrCl(g) H = 29.2 kJ

I really thought it was 107.1 but that was wrong. HELP!?

Answer 1

That notation is hard to read unless one happens to current on chemistry.

Please recheck for typos, and then consider whether it would make more sense to re-ask this under chemistry.