Complete question:
The energy content of raisin bread is 13.1 kJ/g. Calculate the temperature increase when a slice of raisin bread (27.0 g) is burned in the calorimeter. The heat capacity of the calorimeter is 36.7 kJ/°C
Answer:
9 °C
Explanation:
First, we determine the number of kJ in the slice bread by using the energy content of the bread to convert grams to kilojoules
q = energy content x weight of bread
q = 13.1 kJ/g x 27.0 g
q = 353.7 `kJ
Heat of the reaction = - 353.7 kJ (negative because heat is released)
[tex]q_{rxn} = - q_{calorimeter}[/tex]
[tex]q_{rxn} = - C_{calorimeter}[/tex] * ΔT
where ΔT = temperature difference
-353.7 kJ = - 36.7 kJ/°C * ΔT
ΔT = -353.7 kJ
-36.7 kJ/°C
ΔT = 9.6 °C
Therefore, the temperature increase is 9 °C
