What amount of energy (in KJ ) is released in the combustion of 5… - Vidyadip

MCQ

What amount of energy (in $KJ$ ) is released in the combustion of $5.8\,gm$ of $C_4H_{10}\,(g)$ ?

$2{C_4}{H_{10(g)}}\, + \,13{O_{2(g)}}\, \to \,8C{O_{2(g)}}\, + \,10{H_2}{O_{(l)}}\,;$ $\Delta {H^o}\, = \, - \,5756\,KJ$

A
$575.6$
✓
$287.8$
C
$182$
D
$57.56$

✓

Answer

Correct option: B.

$287.8$

b
$2 \mathrm{C}_{4} \mathrm{H}_{10}+13 \mathrm{O}_{2} \rightarrow 18 \mathrm{CO}_{2}+10 \mathrm{H}_{2} \mathrm{O} \,\,\,\,\,\Delta \mathrm{H}=-5756\,\mathrm{KJ}$

$(58 \times 2) g \rightarrow-5756\, \mathrm{KJ}$

$1\, \mathrm{g} \rightarrow \frac{5756}{58 \times 2} \times \frac{58}{10} \,\Rightarrow 2878\, \mathrm{KJ}$

$5.8\, g \rightarrow$

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