Calculate maximum possible heat which can be released if a 4 l aq… - Vidyadip

MCQ

Calculate maximum possible heat which can be released if a $4\ l$ aqueous solution is to be formed by mixing appropriate yolumes of $2\ M\ NaOH$ and $3\ M\ H_2SO_4$ solution $\Delta {H_{{\text{neutralisation}}\,\,{\text{SA/SB}}}} = - 14\ kcal/mol$ ......$ kcal$

A
$14$
B
$112$
✓
$84$
D
$56$

✓

Answer

Correct option: C.

$84$

c
$2 \mathrm{NaOH}+\mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow \mathrm{Na}_{2} \mathrm{SO}_{4}+2 \mathrm{H}_{2} \mathrm{O}$

Let volume of $\mathrm{NaOH}$ for complete reaction

$=V-$ $lit$

$\mathrm{re}$ Mole $2 \mathrm{V} \quad \mathrm{V}$

$\Rightarrow \quad V=3(4-V)$

$\Rightarrow \quad V=3 \,\mathrm{L}$

Maximum possible heat reieased $=6 \times 14$

$=84 \,\mathrm{Kcal}$

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