Answer
$1.199\times 10^5\frac{J}{g}$
Work Step by Step
We know that
$\frac{51600Btu}{1lb}\times \frac{252cal}{1Btu}\times\frac{4.184J}{1cal}\times \frac{1lb}{0.4536Kg}\times \frac{1Kg}{10^3g}=1.199\times 10^5\frac{J}{g}$
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