A 1.500 g sample of benzoic acid (deltaU_combustion = -26.43 kJ/g) is burned in a bomb calorimeter, raising the temperature of the bomb + water from 23.55 C to 27.32 C. In a second experiment, a 0.952 g sample of an unknown solid fuel is burned in the same calorimeter, and the temperature rises by 2.41 C.
What is the heat capacity (calorimeter constant) C_cal of the bomb calorimeter?
- A
1.05 kJ/C
- B
26.43 kJ/C
- Ccheck_circle
10.51 kJ/C
- D
39.65 kJ/C
Explanation
Heat from benzoic acid = 1.500 * 26.43 = 39.65 kJ. C_cal = q / deltaT = 39.65 / 3.77 = 10.51 kJ/C.