Predict the sign of Δ S for the following: (a) precipitating solid AgCl from a solution containing Ag + and Cl - ions (b) dissolving sugar in hot coffee (c) glass turning into sand

(a)

Interpretation:

The sign of the entropy change for the following process should be predicted.

Precipitating of solid silver chloride from a solution containing silver ion and chloride ions

Concept introduction:

Entropy is defined as the ratio of thermal energy to the temperature which is unavailable for work done. It is also defined as the measure of disorder of molecule of a system. It is an extensive property and state function.

Entropy is related with the number of microstates for a system and microstate is defined as the number of ways for the system to be arranged. In different physical states, entropy depends upon the phase of the substance; the order of the entropy is given by: Ssolid<Sliquid<Sgas

The change in entropy is represented as:

ΔS=Sfinal−Sinitial

Where, Sinitial =initial entropy and Sfinal = final entropy

The sign of the entropy should be predicted with the help of above information.

Given process is: Precipitating of solid silver chloride from a solution containing silver ion and chloride ion.

In this case, the solution which contains silver ion and chloride ion has more disorder in comparison to precipitate silver chloride...

(b)

Interpretation:

The sign of the entropy change for the following process should be predicted.

Dissolving sugar in hot coffee

Concept introduction:

Entropy is defined as the ratio of thermal energy to the temperature which is unavailable for work done. It is also defined as the measure of disorder of molecule of a system. It is an extensive property and state function.

Entropy is related with the number of microstates for a system and microstate is defined as the number of ways for the system to be arranged. In different physical states, entropy depends upon the phase of the substance; the order of the entropy is given by: Ssolid<Sliquid<Sgas

The change in entropy is represented as:

ΔS=Sfinal−Sinitial

Where, Sinitial =initial entropy and Sfinal = final entropy

The sign of the entropy should be predicted with the help of above information.

(c)

Interpretation:

The sign of the entropy change for the following process should be predicted with reason.

Glass turning into sand

Concept introduction:

Entropy is defined as the ratio of thermal energy to the temperature which is unavailable for work done. It is also defined as the measure of disorder of molecule of a system. It is an extensive property and state function.

Entropy is related with the number of microstates for a system and microstate is defined as the number of ways for the system to be arranged. In different physical states, entropy depends upon the phase of the substance; the order of the entropy is given by: Ssolid<Sliquid<Sgas

The change in entropy is represented as:

ΔS=Sfinal−Sinitial

Where, Sinitial =initial entropy and Sfinal = final entropy

The sign of the entropy should be predicted with the help of above information.