When water freezes in a glass beaker, choose the correct statement amongst the following:

Δ S_{s y s t e m}

decreases but

Δ S_{s u r r o u n d i n g s}

remains the same.

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Δ S_{s y s t e m}

increases but

Δ S_{s u r r o u n d i n g s}

decreases.

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Δ S_{s y s t e m}

decreases but

Δ S_{s u r r o u n d i n g s}

increases.

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Δ S_{s y s t e m}

decreases and

Δ S_{s u r r o u n d i n g s}

also decreases.

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Solution

The correct option is B $Δ S_{s y s t e m}$ decreases but $Δ S_{s u r r o u n d i n g s}$ increases.
As water freezes from liquid to solid, randomness decreases, i.e., $Δ S_{s y s t e m}$ decreases. Heat released during the process is absorbed by the surroundings, hence, $Δ S_{s u r r o u n d i n g s}$ increases.

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is-

The entropy change can be calculated by using the expression $Δ S = \frac{q_{r e v}}{T}$ .
When water freezes in a glass beaker, choose the correct statement amongst the following.
(a) $Δ$ S (system) decreases but $Δ$ S (surroundings) remains the same
(b) $Δ$ S (system) increases but $Δ$ S (surroundings) decreases
(c) $Δ$ S (system) decreases but $Δ$ S (surroundings) increases
(d) $Δ$ S (system) decreases but $Δ$ S (surroundings) also decreases

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When water freezes in a glass beaker, choose the correct statement amongst the following:

The correct option is B ΔSsystem decreases but ΔSsurroundings increases.As water freezes from liquid to solid, randomness decreases, i.e., ΔSsystem decreases. Heat released during the process is absorbed by the surroundings, hence, ΔSsurroundings increases.