The value of Δ S is positive for (1) evaporation of water (2) dissolution of sugar in water (3) crystallisation of salt from brine (4) stretching of rubber band

Question

The value of Δ S is positive for (1) evaporation of water (2) dissolution of sugar in water (3) crystallisation of salt from brine (4) stretching of rubber band (A) 1, 2 and 3 are correct (B) 1 and 2 are correct (C) 2 and 4 are correct (D) 1 and 3 are correct

Tardigrade Admin · Accepted Answer

Entropy is the measure of randomness. As the randomness increases, entropy increases. The order of entropy is gas

>

liquid

>

solid.
Thus,

Δ S

is positive, when water is evaporated (ie, liquid converts into gas) and sugar is dissolved in water (ie, solid converts into liquid).

Q. The value of ΔS is positive for (1) evaporation of water (2) dissolution of sugar in water (3) crystallisation of salt from brine (4) stretching of rubber band

1, 2 and 3 are correct

1 and 2 are correct

2 and 4 are correct

1 and 3 are correct

Entropy is the measure of randomness. As the randomness increases, entropy increases. The order of entropy is gas > liquid > solid. Thus, ΔS is positive, when water is evaporated (ie, liquid converts into gas) and sugar is dissolved in water (ie, solid converts into liquid).

Q. The value of $Δ S$ is positive for
(1) evaporation of water
(2) dissolution of sugar in water
(3) crystallisation of salt from brine
(4) stretching of rubber band

Entropy is the measure of randomness. As the randomness increases, entropy increases. The order of entropy is gas $>$ liquid $>$ solid.
Thus, $Δ S$ is positive, when water is evaporated (ie, liquid converts into gas) and sugar is dissolved in water (ie, solid converts into liquid).