Dissolution of ammonium chloride in water leads to a cooling sensation. At constant temperature, this process is accompanied by

Question

Dissolution of ammonium chloride in water leads to a cooling sensation. At constant temperature, this process is accompanied by (A) increase in entropy (B) decrease in entropy (C) decrease in enthalpy (D) no change in entropy

Tardigrade Admin · Accepted Answer

Since, cooling is produced, the reaction is endothermic, ie,

Δ H = + v e

.

Δ G = Δ H - T Δ S

[For spontaneous process

Δ G = - v e]

As the value of

Δ H

is positive, the value of

Δ S

must be positive to get a negative value of

Δ G

. Thus, the process is accompanied by increase in entropy.

Q. Dissolution of ammonium chloride in water leads to a cooling sensation. At constant temperature, this process is accompanied by

increase in entropy

decrease in entropy

decrease in enthalpy

no change in entropy

Since, cooling is produced, the reaction is endothermic, ie, ΔH=+ve. ΔG=ΔH−TΔS [For spontaneous process ΔG=−ve] As the value of ΔH is positive, the value of ΔS must be positive to get a negative value of ΔG. Thus, the process is accompanied by increase in entropy.