The molar heats of fusion of water and iodine are 6.02 kJ/mol and 16.7 kJ/mol, respectively. It will take more energy to melt a gram of ice than to melt a gram of solid iodine.

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Quizplus · Accepted Answer

This statement is false. The molar heat of fusion of iodine is higher than that of water, meaning it takes more energy to melt one mole of iodine than one mole of water. However, the statement is comparing the melting of one gram of each substance. Since the molar mass of iodine is much higher than that of water, one gram of iodine contains fewer moles than one gram of water. Therefore, it takes less energy to melt one gram of iodine than one gram of water.

The Molar Heats of Fusion of Water and Iodine Are