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

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry5. Thermodynamics and thermochemistry1 Mark
MCQ
For spontaneity of a cell, which is correct
  • A
    $\Delta G = 0,\,\Delta E = 0$
  • B
    $\Delta G = - ve,\,\Delta E = 0$
  • C
    $\Delta G = + ve,\,\Delta E = + ve$
  • ✓
    $\Delta G = - ve,\,\Delta E = + ve$
✓

Answer

Correct option: D.
$\Delta G = - ve,\,\Delta E = + ve$
(d)$\Delta G = \Delta H - T\Delta S$; $\Delta G = \Delta E + P\Delta V - T\Delta S$
For spontaneity $(\Delta G = - ve)$
$\Delta G = - ve$, $\Delta E = + ve$

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