The entropy change in the fusion of 1 mol of a solid melting at 27^∘ C (Latent heat of fusion, .

step 1 I know that change in entropy, change in entropy represented by delta as is given by Q by T wher

The entropy change in the fusion of 1 mol of a solid melting...

The entropy change in the fusion of 1 mol of a solid melting at $27^{\circ} \mathrm{C}$ (Latent heat of fusion, $\left.2930 \mathrm{~J} \mathrm{~mol}^{-1}\right)$ is (a) $9.77 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}$ (b) $10.73 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}$ (c) $2930 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}$ (d) $108.5 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}$

The entropy change in the fusion of 1 mol of a solid melting at $27^{\circ} \mathrm{C}$ (Latent heat of fusion, $\left.2930 \mathrm{~J} \mathrm{~mol}^{-1}\right)$ is
(a) $9.77 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}$
(b) $10.73 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}$
(c) $2930 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}$
(d) $108.5 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}$

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Key Concepts

Phase Transition (Fusion)

Fusion refers to the phase transition from a solid to a liquid state. During fusion, the system absorbs a specific amount of latent heat at a constant temperature, leading to an increase in entropy. This process exemplifies how energy is absorbed at a fixed temperature to overcome the structural order in the solid phase.

Temperature Conversion to Kelvin

In thermodynamic calculations, it is essential to express temperatures in Kelvin, as this is the absolute scale required for precise and accurate calculations in formulas like ?S = ?H/T. Conversion from Celsius to Kelvin is done by adding 273.15 to the Celsius temperature.

Entropy Change

In thermodynamics, entropy change quantifies the degree of disorder introduced in a system during a process. For reversible processes, especially phase transitions, entropy change can be calculated using the relation ?S = ?H/T, where ?H is the enthalpy change associated with the process and T is the absolute temperature.

Latent Heat

Latent heat is the amount of heat absorbed or released per mole (or per unit mass) during a phase change, such as fusion or vaporization, at constant temperature and pressure. It represents the energy required to overcome intermolecular forces without a change in temperature, making it a central concept in phase transitions.

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