0.687 g of a compound whose molar mass is 100.0 g/mol areignited in a bomb calor

  

0.687 g of a compound whose molar mass is 100.0 g/mol areignited in a bomb calorimeter whose heat capacity is 768.6 J/oC.The temperature of the apparatus rises from 20.13oC to 23.96oC.Calculate the molar heat of combustion of the compound inkJ/mol.