Asked by 01236
Choose the system from each pair that likely has the higher entropy.
ice
liquid water
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Liquid water.
Reason: entropy measures the number of accessible microstates (degree of disorder). In ice molecules are locked into a hydrogen-bonded lattice with restricted positions and motions; in liquid water molecules move and reorient freely, so there are many more microstates. Consequently melting increases entropy (ΔSfus = ΔHfus/T ≈ 6.01 kJ·mol⁻¹ / 273.15 K ≈ 22.0 J·mol⁻¹·K⁻¹), so liquid water has the higher entropy.
Reason: entropy measures the number of accessible microstates (degree of disorder). In ice molecules are locked into a hydrogen-bonded lattice with restricted positions and motions; in liquid water molecules move and reorient freely, so there are many more microstates. Consequently melting increases entropy (ΔSfus = ΔHfus/T ≈ 6.01 kJ·mol⁻¹ / 273.15 K ≈ 22.0 J·mol⁻¹·K⁻¹), so liquid water has the higher entropy.
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