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The complete combustion of salicylic acid releases 21.90 kJ of energy per gram of salicylic acid....

The complete combustion of salicylic acid releases 21.90 kJ of energy per gram of salicylic acid. In a particular bomb calorimeter (initially at room temperature), the combustion of 0.2038 g of salicylic acid, in the presence of excess oxygen, causes the temperature of the calorimeter to rise by 2.94 °C. When a 0.2172-g sample of an unknown organic substance is similarly burned in the same calorimeter, the temperature rises by 4.58 °C. What is the energy of combustion per unit mass of the unknown substance?

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