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

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry5. Thermodynamics and thermochemistry1 Mark
MCQ
For a reaction to be spontaneous at all temperatures
  • A
    $\Delta G -ve, \Delta H + ve$ and $\Delta S +ve$
  • B
    $\Delta G + ve, \Delta H  -ve$ and $\Delta S +ve$
  • C
    $\Delta G -ve, \Delta H - ve$ and $\Delta S -ve$
  • ✓
    $\Delta G -ve, \Delta H -ve$ and $\Delta S +ve$
✓

Answer

Correct option: D.
$\Delta G -ve, \Delta H -ve$ and $\Delta S +ve$
d
Since $\Delta G = \Delta H - T\Delta S$ If $\Delta G$ is negative, $\Delta H$ is negative and $\Delta S$ is positive, then the reaction will be spontaneous at all temperatures

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