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General Principles and processes of Isolation of Elements
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If the standard molar enthalpy change for combustion of graphite powder is $-2.48 \times 10^{2}\, \mathrm{~kJ}\,\mathrm{~mol}^{-1}$, the amount of heat generated on combustion of $1\, \mathrm{~g}$ of graphite powder is $.....\, \mathrm{~kJ} .$
(Nearest integer)
A
$50$
B
$21$
C
$40$
D
$11$
(JEE MAIN-2021)
Solution
$\mathrm{C}_{\text {graphite }}+\mathrm{O}_{2(\mathrm{~g})} \rightarrow \mathrm{CO}_{2(9)}$
$\Delta \mathrm{H}=-2.48 \times 10^{2}$
Heat generated $=\frac{2.4 \times 10^{2}}{12} \,\mathrm{KJ}$
Standard 12
Chemistry
