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  3. Chemistry
  4. If the standard molar enthalpy change for combustion of graphite powder is -2.48 × 102 kJ mol -1, the amount of heat generated on combustion of 1 g. of graphite powder is k J.

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Q. If the standard molar enthalpy change for combustion of graphite powder is $-2.48 \times 10^{2} \,kJ\, mol ^{-1}$, the amount of heat generated on combustion of $1 \,g$. of graphite powder is _________$k J$.

JEE MainJEE Main 2021Thermodynamics

Solution:

$1 \,mol$ graphite $=12\, gm C$
Ans. $=\frac{248}{12}=20.67\, kJ / gm$ heat evolved