Asample of iron (fe) with a mass of 200.0 g releases 9,840 cal when it freezes at its freezing point. what is the molar heat of fusion for iron?

The correct answer is 2747.7 Cal/mol.

Explanation:

The molar heat of fusion is illustrated as the amount of heat required to dissolve 1 mole of a substance at its melting point.  

The atomic mass of iron = 55.845 g/mol

The mass of iron given = 200 g

The number of moles of iron = 200 g / 55.845 g/mol

= 3.581 moles

The heat discharged = 9840 Cal

The molar heat of fusion = Heat discharged / number of moles

= 9840 Cal / 3.581 moles

= 2747.7 Cal / mol

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