Chemical Thermodynamics — Chemistry STD 12 Science — Question
Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryChemical Thermodynamics2 Marks
Question
What is enthalpy of fusion?
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Answer
Enthalpy of fusion $\left(\Delta_{ fus } H \right)$ : The enthalpy change that accompanies the fusion of one mole of a solid into a liquid at constant temperature and pressure is called enthalpy of fusion. For example, $ H _2 O _{( s )} \stackrel{1 atm , 273 K }{\longrightarrow} H _2 O _{( l )} \quad \Delta_{\text {fus }} H=6.01 kJ mol ^{-1} $ This equation describes that when one mole of ice melts (fuses) at $0{ }^{\circ} C$ (273 K) and 1 atmosphere, $6.1 kJ$ of heat will be absorbed.
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