The complete combustion of salicylic acidreleases 21.90 kJ of energy per gram of salicylic acid. In aparticular bomb calorimeter (initially at room temperature), the combustion of 0.1858 g of salicylic acid, in the presence of excessoxygen, causes the temperature of the calorimeter to rise by 2.32°C. When a 0.3044-g sample of an unknown organic substance issimilarly burned in the same calorimeter, the temperature rises by3.72 °C. What is the energy of combustion per unit mass of the unknown substance?