In which equation does the term "heat" represent heat of fusion?
(1) NaCl(s) + heat -->NaCl(l)
(2) NaOH(aq) + HCl(aq) -->NaCl(aq) + H2O(l) + heat
(3) H2O(l) + heat --> H2O(g)
(4) H2O(l) + HCl(g) -->H3O+(aq) + Cl-(aq) + heat

Answer :


The answer is 1


The equation where the term heat represents the heat of fusion is NaCl(s) + heat -->NaCl(l).

The heat of fusion is the heat required to break the intermolecular interactions in a solid as it is converted to the liquid. Hence, the process of fusion is the process of converting a solid into a liquid.

Examining the equations shown in the options closely, we will discover that in the equation; NaCl(s) + heat -->NaCl(l), heat is supplied to sodium chloride solid and it is converted to liquid. The heat involved in this process is the heat of fusion.

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