Q. For spontaneity of a cell, which is correct?
A) $\mathrm{\Delta}G = 0,\ \mathrm{\Delta}E = 0$
B) $\mathrm{\Delta}G = - ve,\ \mathrm{\Delta}E = 0$
C) $\mathrm{\Delta}G = + ve,\ \mathrm{\Delta}E = + ve$
D) $\mathrm{\Delta}G = - ve,\ \mathrm{\Delta}E = + ve$
Explanation
(d)
$\mathrm{\Delta}G = \mathrm{\Delta}H - T\mathrm{\Delta}S:\mathrm{\Delta}G = \mathrm{\Delta}E + p\mathrm{\Delta}V - T\mathrm{\Delta}S$
For spontaneity $\mathrm{\Delta}G = - ve$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.