Question

A 1.00-g sample of hexane, C6H14, undergoes complete combustion with excess O2 in a bomb calorimeter. The
temperature of the 1500. g of water surrounding the bomb rises from 22.64°C to 29.30°C. The heat capacity
of the calorimeter is 4.04 kJ/°C. What is ΔE for the reaction in kJ/mol of C6H14. The specific heat of water is
4.184 J/g·°C.

Answer 1

First calculate q = mc delta T for the heat gained by the water. Remember to use the mass of water and specific heat of the water for this calculation. Make sure to convert to kJ

Then calculate the heat gained by the calorimeter q = heat capacity * delta T

Then divide total heat in kJ / number of moles of C6H14