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

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry5. Thermodynamics and thermochemistry1 Mark
MCQ
In the complete combustion of butanol ${C_4}{H_9}OH(l)$, if $\Delta H$ is enthalpy of combustion and $\Delta E$ is the heat of combustion at constant volume, then
  • A
    $\Delta H < \Delta E$
  • B
    $\Delta H = \Delta E$
  • ✓
    $\Delta H > \Delta E$
  • D
    $\Delta H,\,\Delta E$ relation cannot be predicted
✓

Answer

Correct option: C.
$\Delta H > \Delta E$
(c)In the complete combustion of butanol $\Delta H > \Delta E$.

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