Practice question
Question
Calculate Δ Stotal when 1 mol of ice melts at 263 K if Δ Hfus = 6.01 kJ/mol and melting point is 273 K.
Explanation
Δ Ssys = Δ Hfus / Tm = 6.01 × 10³ / 273 = 22.01 J/K, Δ Ssurr = -Δ H / T = -6.01 × 10³ / 263 = -22.85 J/K, Δ Stotal = 22.01 - 22.85 = -0.84 J/K.
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