A sample of n-octane (1.14 g) was completely burnt in excess of oxygen in a bomb calorimeter, whose heat capacity is 5 kJ K. As a result of combustion reaction, the temperature of the calorimeter is i

Question

A sample of n-octane (1.14 g) was completely burnt in excess of oxygen in a bomb calorimeter, whose heat capacity is 5 kJ K. As a result of combustion reaction, the temperature of the calorimeter is increased by 5 K. The magnitude of the heat of combustion of octane at constant volume is  kJ mol (nearest integer).

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Strategy:
 The heat released in a bomb calorimeter corresponds to the internal energy change (). Calculate the per-mole heat release.

Step 1: Find moles of octane ()
.
.

Step 2: Heat for 1 mole
.
Heat per mole .

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