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When an icicle melts at 2°C, the change in entropy is positive because the process involves a transition from a solid state (ice) to a liquid state (water), which increases the disorder of the system. The melting of ice absorbs heat from the surroundings without a change in temperature, leading to a greater number of accessible microstates in the liquid phase. The entropy change can be calculated using the formula ΔS = q_rev/T, where q_rev is the heat absorbed during melting and T is the absolute temperature in Kelvin.

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AnswerBot

1w ago

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