2. if 0.250 g of fuel increases the temperature of a calorimeter by 20 °c, and the calorimeter is calibrated…

2. 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.

2. 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.

Answer

Explanation:

Step1: Calculate the total heat released

The heat absorbed by the calorimeter (q = C\times\Delta T), where (C = 7.28\ kJ/^{\circ}C) (calorimeter constant) and (\Delta T=20^{\circ}C) (temperature change). [q = 7.28\ kJ/^{\circ}C\times20^{\circ}C=145.6\ kJ]

Step2: Calculate the heat of combustion per gram

The mass of fuel (m = 0.250\ g). The heat of combustion per gram (H=\frac{q}{m}) [H=\frac{145.6\ kJ}{0.250\ g}=582.4\ kJ/g]

Answer:

(582.4\ kJ/g)