A1.800 g sample of octane, c8h18, is burned a calorimeter whose total heat capacity is 12.66 kj/°c. if the temperature of the calorimeter increased from 22.36 °c to 28.78 °c, then what is the δh for the combustion of one mole of octane? do not add the unit in the answer.

Explanation:-

As we know heat released will be same as heat absorbed by the calorimeter

= Heat gained by bomb calorimeter

=Heat capacity of bomb calorimeter=12.66 kJ/°C

Change in temperature = ΔT=  

Let the heat released during reaction be q.

q = Heat released = 81.3 kJ

1.800 g of octane releases = 81.3 kJ of heat

Moles of octane =

0.01579 moles of octane releases 81.3 kJ of heat

1 mole of octane releases = of heat

Thus  for the combustion of one mole of octane is