A bomb calorimeter , or a constant volume calorimeter, is a device often used to determine the heat of combustion of fuels and the energy content of foods. In an experiment, a 0.3270 g sample of...

A
bomb calorimeter
, or a constant volume calorimeter, is a device often used to determine the heat of combustion of fuels and the energy content of foods.

In an experiment, a0.3270 g sample ofphenanthrene (C₁₄H₁₀
) is burned completely in a bomb calorimeter. The calorimeter is surrounded by1.182×10³
 g of water. During the combustion the temperature increases from27.70 to30.02 °C. The heat capacity of water is 4.184 J g^-1°C^-1.


The heat capacity of the calorimeter was determined in a previous experiment to be828.6 J/°C.


Assuming that no energy is lost to the surroundings, calculate the molar heat of combustion ofphenanthrene based on these data.