Which of the following best expresses the increase in entropy associated with melting and sublimation,respectively? A)Δ_fusS - Δ_subS = 0 B)Δ_fusS = 144.3 J/mol-K,Δ_subS = 9.0 J/mol-K C)Δ_fusS = 9.0 J/mol-K,Δ_subS = -144.3 J/mol-K D)ΔH for both processes is zero E)Δ_fusS = 9.0 J/mol-K,Δ_subS= 144.3 J/mol-K

Question

Quizplus · Accepted Answer

The increase in entropy associated with melting and sublimation can be determined using ΔS = ΔH/T, where ΔH is the enthalpy of fusion or sublimation and T is the temperature in Kelvin. Since the process of melting or sublimation involves an increase in entropy, the value of ΔS will be positive. From the given options, only choice E shows positive values for both Δ_fusS and Δ_subS, which suggests an increase in entropy for both processes. The values are also consistent with the fact that sublimation requires more energy than melting, leading to a higher increase in entropy. Therefore, the correct answer is E.

Which of the Following Best Expresses the Increase in Entropy