1. The following (unbalanced) combustion reaction occurs in an oxyacetylene torch: HCCH+O=OO=C=O+HOH Balance the reaction (fill in the boxes), then calculate the bond dissociation energy (in kJ/mol) of the O=O bond ( D0=0 ). Hint: consider two different methods for determining Hrxn. Useful Information: H(C2H2,g)=227.4kJ/molHf(O2,g)=???H(CO2,g)=393.5kJ/molH(H2O,g)=241.8kJ/molCH=415kJ/molCC=837kJ/molC=O=745kJ/molOH=464kJ/molO=O=??? O=O kJ/mol