What is #DeltaG# for a solid melting at its normal melting point?

1 Answer
Truong-Son N.
Nov 12, 2016

#DeltaG# is #0# for a process at constant #T# and #P#.

Since we are looking at the normal melting point of water ice, it means that we are at a constant #T_"nmp"# and #P_"norm" = "1 atm"#.

From the Maxwell Relation:

#dG = -SdT + VdP#

But at constant #T# and #P#, #dT = 0# and #dP = 0#. Therefore:

#color(blue)(DeltaG_"melt") = -S(0) + V(0) = color(blue)(0)#

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