1. Tardigrade
  2. Question
  3. Chemistry
  4. 4 g of graphite is burnt in a bomb calorimeter of heat capacity 30 kJ K -1. In excess of oxygen at 1 atm pressure the temperature rises from 300 K to 304 K. What is the enthalpy of combustion of graphite (in kJ mol -1 )?

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Q. $4\, g$ of graphite is burnt in a bomb calorimeter of heat capacity $30\, kJ\, K ^{-1}$. In excess of oxygen at 1 atm pressure the temperature rises from $300 K$ to $304\, K$. What is the enthalpy of combustion of graphite (in $kJ\, mol ^{-1}$ )?

Thermodynamics

Solution:

$C +1 / 2 O _{2} \rightarrow CO$
$\Delta H =30 \times 4 \times 3 \,kJ\, mol =360 \,kJ\, mol ^{-1}$