A) Faraday
B) Kirchhoff
C) Einstein
D) Gibbs-Helmholtz
Correct Answer: D
Solution :
Gibbs Helmholtz equation \[\Delta G=\Delta H-T\Delta S\] \[\Delta S=\]Gibb's free energy \[\Delta H=\]enthalpy change \[\Delta S=\]entropy change This equation is very helpful in producting the spontaneity of a process. \[\to \] If \[\Delta G\]is negative i.e., \[\Delta G<0,\]indicate that the process is spontaneous \[\to \] If \[\Delta G=0\]i.e., \[T\,\Delta S=0,\,\Delta S=0,\,\] process is in equilibrium. \[\to \]\[\Delta G\] is positive i.e., \[\Delta G>0,\]process is non spontaneous. Faraday gave the law of electrolysis I law: w = Zit w = substance deposited i = current (ampere) t = time (sec) Z = electrochemical equivalent II law: \[\frac{{{w}_{1}}}{{{w}_{2}}}=\frac{{{Z}_{1}}}{{{Z}_{2}}}=\frac{{{E}_{1}}}{{{E}_{2}}}\] \[{{w}_{1}},{{w}_{2}}\]are the masses of substances liberated by passing the same quantity of electricity and \[{{E}_{1}}\]and \[{{E}_{2}}\] are their equivalent masses. Einstein gave the energy relationship \[E=m{{c}^{2}}(c=3\times {{10}^{8}}m/s)\] \[m=mass\] \[E=energy\]
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