What is the heat of combustion in kJ/g of benzoic acid (C₆H₅COOH)if the initial temperature was 22.62 °C,the final temperature was 31.10 °C,the heat capacity of the bomb calorimeter was 4.88 kJ/ °C,and 1.567 grams were combusted?

Question

Quizplus · Accepted Answer

The heat of combustion can be calculated using the formula: heat of combustion = (heat capacity of the calorimeter * change in temperature) / mass of the substance. Here, the change in temperature is 31.10 °C - 22.62 °C = 8.48 °C. The heat absorbed by the calorimeter is 4.88 kJ/°C * 8.48 °C = 41.4 kJ. Therefore, the heat of combustion per gram of benzoic acid is -41.4 kJ / 1.567 g = -26.4 kJ/g. The negative sign indicates that heat is released during the combustion.

What Is the Heat of Combustion in KJ/g of Benzoic