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5. Thermodynamics and thermochemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry5. Thermodynamics and thermochemistry1 Mark
MCQ
When the aqueous solution of $0.5\, mole $ $HN{O_3}$ is mixed with the $0.3\, mole$  of $O{H^ - }$ solution, then what will be the liberated heat.......$kJ$ (Enthalpy of neutralization is $= 57.1 \,kJ$ )
  • A
    $28.5 $
  • ✓
    $17.1$
  • C
    $45.7$
  • D
    $1.7$
✓

Answer

Correct option: B.
$17.1$
(b) $0.3$  mole $O{H^ - }$, neutralize $0.3 $ mole of $HN{O_3}$
Evolved heat, $ = 57.1 \times 0.3 = 17.13\,kJ$

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