The heat of neutralisation of a strong acid and a strong alkali is 57.0 kJ ${\rm{mo}}{{\rm{l}}^{ - 1}}$. The heat released when 0.5 mole of ${\rm{HN}}{{\rm{O}}_3}$ solution is mixed with 0.2 mole of KOH is

NEET UG CHEMISTRY MCQ: THERMODYNAMICS

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Application +4 | -1

The heat of neutralisation of a strong acid and a strong alkali is 57.0 kJ

\mathrm{mo}{\mathrm{l}^{ - 1}}

. The heat released when 0.5 mole of

\mathrm{HN}{\mathrm{O}_3}

solution is mixed with 0.2 mole of KOH is

View answer and explanation

Correct option: B

11.4 kJ

Option B (11.4 kJ) is correct because the heat released is determined by the limiting reactant (KOH) and the heat of neutralization.

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{T_i}

{T_f}

\mathrm{H}_2 \mathrm{O}(\mathrm{s}) \rightarrow \mathrm{H}_2 \mathrm{O}(\mathrm{g})

\mathrm{X}_2 \mathrm{O_4(l}) \longrightarrow 2 \mathrm{XO}_2(\mathrm{g}), \Delta U=2.1 \mathrm{~kcal}, \Delta S=20 \mathrm{~cal} \mathrm{~K}^{-1}

300 \mathrm{~K}

\Delta G