What is the entropy change (in JK^-1 mol^-1 ) when 1 mol of ice is converted into water at 0^∘

step 1 We know that change in entropy delta s is Q by T. Now in the question Q heat value is given as 6

What is the entropy change (in JK^-1 mol^-1 ) when 1 mol of...

What is the entropy change (in $\mathrm{JK}^{-1} \mathrm{~mol}^{-1}$ ) when 1 mol of ice is converted into water at $0^{\circ} \mathrm{C}$ ? (The enthalpy change for the conversion of ice to liquid water is 6.0 $\mathrm{kJ} \mathrm{mol}{ }^{-1}$ at $0^{\circ} \mathrm{C}$ ) (a) 2.198 (b) 21.98 (c) 20.13 (d) 2.013

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Key Concepts

Temperature in Kelvin

The Kelvin scale is used for thermodynamic calculations because it is an absolute temperature scale. Converting Celsius to Kelvin is essential, as thermodynamic formulas like ?S = ?H/T require temperature inputs in Kelvin, ensuring accurate computation of changes like entropy.

Latent Heat of Fusion

Latent heat of fusion is the energy required to change a substance from solid to liquid at its melting point without changing its temperature. This value, when divided by the absolute temperature, yields the entropy change for the melting process.

Entropy Change

Entropy change is a measure of the change in disorder or randomness within a system during a thermodynamic process. It is defined by the relation ?S = ?H/T for reversible changes occurring at constant temperature, where ?H is the enthalpy change and T is the absolute temperature in Kelvin.

Phase Transition (Melting/Fusion)

A phase transition refers to the process of changing from one state of matter to another, such as from a solid to a liquid. During melting (fusion), the energy absorbed is known as the latent heat of fusion, which is crucial in determining the entropy change associated with the transition.

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