The molar heat of fusion of iron is 2,747.7 cal/mol. Thus, option A is correct.
Molar heat of fusion is the amount of heat required to convert 1 gram of substance from liquid to solid.
The molar heat of fusion is given as:
[tex]q=\dfrac{m}{molar\;mass} \;\times \Delta H[/tex]
The given sample has mass, m 200 g.
The molar mass of iron is 55.845 g/mol
The amount of heat released, q is 9,840 cal
The molar heat of fusion ([tex]\Delta H[/tex]) is given by substituting the values as:
[tex]\rm 9,840\;cal= \dfrac{200\;g}{55.845 \;g/mol} \times\;\Delta H\\\\\Delta H=\dfrac{9,840\;cal\;\times\;55.845 \;g/mol}{200\;g} \\\\\Delta H=2,747.7 \;cal/mol[/tex]
The molar heat of fusion of iron is 2,747.7 cal/mol. Thus, option A is correct.
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Answer:
he molar heat of fusion of iron is 2,747.7 cal/mol.
Explanation:
