2.4 g coal is burnt in a bomb calorimeter in excess oxygen at 298 K & 1 atm. Temperature rises from 298 K to 300 K. Enthalpy change during combustion is . Value of is .

[Heat capacity of bomb calori

Question

2.4 g coal is burnt in a bomb calorimeter in excess oxygen at 298 K & 1 atm. Temperature rises from 298 K to 300 K. Enthalpy change during combustion is . Value of  is .

[Heat capacity of bomb calorimeter = . Coal = pure carbon]

Canvas Classes · Accepted Answer

Strategy:
 In a bomb calorimeter, the heat energy released is measured at constant volume (). Relate the temperature rise and heat capacity to total energy, then normalize per mole of combustible material.

Step 1: Calculate heat released ()
.

Step 2: Calculate moles of Carbon
Moles .

Step 3: Determine  and 
Internal energy change per mole .
For , , so .
The magnitude .

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