Find the entropy change of the universe when 2mol of water freezes at -10 ∘C.?
The ΔG for the freezing of H2O(l) at -10 ∘C is -210 J/mol and the heat of fusion of ice at this temperature is 5610 J/mol .
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The operative equation is Delta G = Delta H - TDeltaS
Since the question involves 2 moles, multiply your given values you 2. Then:
-420 J = +11220 J + 263K Delta S
263 K Delta S = 10800 J
Delta S = +41.1 J/K