working with the enthalpy of combustion
C6H4(OH)2 + H2O2 C6H4O2 + 2H2O

Data:

C6H4(OH)2 C6H4O2 +H2 +177.4kJ
H2 +O2 H2O2 -191.2kJ
H2 + 1/2 O2 H2O -241.8kJ
H2O H2O -43.8kJ