The combustion of 90.0 g of oxalic acid, C2H2O4(s) in a bomb calorimeter whose heat capacity is 4.60 kJ/ °C causes the temperature to rise from 25.0 °C to 79.6 °C. What is the heat of combustion of oxalic acid?
◦ -21.2 kJ/mol
◦ -54.6 kJ/mol
◦ -126 kJ/mol
◦ -211 kJ/mol
◦ -251 kJ/mol