Which of the following relations is correct?

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(B) The Gibbs function $G$ is defined as $G = H - T S$.Taking the differential of both sides,we get $d G = d H - T d S - S d T$ $(i)$.From the definit

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$d G = V d p - S d T$

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(B) The Gibbs function $G$ is defined as $G = H - T S$.Taking the differential of both sides,we get $d G = d H - T d S - S d T$ $(i)$.From the definition of enthalpy,$H = U + p V$,so $d H = d U + p d V + V d p$.Substituting the first law of thermodynamics $d U = T d S - p d V$ into the expression for $d H$,we get $d H = (T d S - p d V) + p d V + V d p = T d S + V d p$.Now,substitute $d H = T d S + V d p$ into equation $(i)$:$d G = (T d S + V d p) - T d S - S d T$$d G = V d p - S d T$.

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