Chapter 9, Problem 9.62P

The heating value of a fuel oil is to be measured in a constant-volume bomb calorimeter. The bomb is charged with oxygen and 0.00215 $I{b}_m$of the fuel and is then sealed and immersed in an insulated container of water. The initial temperature of the system is 77.00°F. The fuel-oxygen mixture is ignited, and the fuel is completely consumed. The combustion products are CO₂(g) and H₂O(v). The final calorimeter temperature is 89.06°F. The mass of the calorimeter, including the bomb and its contents, is 4.62 $I{b}_m$, and the average heat capacity of the system (C_v) is 0.900 Btu/(lb_m·°F).

Calculate $\Delta {\hat{U}}_c^{°}\left(Btu/I{b}_{m}oil\right)$

1. for the combustion of the fuel oil at 77°F. Briefly explain your calculation.
2. What more would you need to know to determine the higher heating value of the oil?