Part A
When a 0.235-g sample of benzoic acid is combusted in a bomb calorimeter, the temperature rises 1.641 "C. When a 0 255-g sample of caffeine, C₂ HO₂N₁ is bumed, the temperature rises 1.457 °C. Using the
value 26.38 kJ/g for the heat of combustion of benzoic acid, calculate the heat of combustion per mole of caffeine at constant volume
5 ΑΣΦ
4
?
kJ/mol