Question #227205

If 0.250 g of fuel increases the temperature of a calorimeter by 20 °C, and the calorimeter is calibrated at 7.28 kJ/°C, calculate the heat of combustion of fuel per gram. SHOW ALL YOUR WORK

Expert's answer

Heat lost by the burning fuel =- heat gained by the calorimeter

"q=-C \\Delta T"

where C is the heat capacity of calorimeter

"q=-7.28 \\times 20 =-145.6 \\;KJ"

Therefore heat of combustion

"=\\frac{-145.6}{0.250} =-582.4 \\;KJ\/g"

The heat required for combustion is -582.4 KJ/g

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